DNA privacy: don't flatter yourself

The secrets contained in our individual genomes are less valuable than we like to believe

IMAGINE donating your DNA to a project aimed at discovering links between genes and diseases. You consent to your genome sequence being released anonymously into the public domain, though you are warned there is a remote possibility that it might one day be possible to link it back to you.

A few years later, that remote possibility comes to pass. How should you feel? This is no longer a hypothetical scenario. About 50 people who participated in a project called 1000 Genomes have been traced (see "Matching names to genes: the end of genetic privacy?").

The researchers' intentions were honourable. They have not revealed these identities, and the original data has been adjusted to make a repeat using the same technique impossible. All they wanted to do was expose privacy issues.

Consider them exposed. It is clear that genomics has entered a new phase, similar to that which social media went through a few years ago, when concerns were raised about people giving away too much personal information.

What happens when the same applies to our DNA? Having your genome open to public scrutiny obviously raises privacy issues. Employers and insurers may be interested. Embarrassing family secrets may be exposed.

But overall, personal genetic information is probably no more revealing than other sorts. In fact there are reasons to believe that it is less so: would an insurance company really go to the trouble of decoding a genome to discover a slightly elevated risk of cancer or Alzheimer's disease?

The available evidence suggests not. In 2006, Harvard University set out to sequence the genomes of 100,000 volunteers and make them publicly available, along with personal information such as names and medical records. One of the goals was to see what happens when such data is open to all. The answer seems to be "not a lot". So far this Personal Genome Project has published 148 people's full genomes. Not one volunteer has reported a privacy issue.

This is not a reason for complacency, but it suggests that our genomic secrets are less interesting to other people than we might like to believe.

If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.

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Satellite images reveal activity at North Korean test site

SEOUL: New satellite images reveal ongoing activity at North Korea's atomic test site, according to a US research institute, as expectation mounts of an imminent nuclear detonation by the isolated state.

The images, as recent as January 23, suggest the facility would be ready to conduct a test "in a few weeks or less" once the order is given, the US-Korea Institute at Johns Hopkins University posted on its 38 North website on Sunday.

"Snowfall and subsequent clearing operations as well as tracks in the snow reveal ongoing activity at buildings and on roadways near the possible test tunnel," it said.

The institute's analysis followed a series of daily threats from North Korea that it is preparing its third nuclear test in response to UN sanctions imposed on Pyongyang for a long-range rocket launch in December.

In a meeting with top security officials, North Korean leader Kim Jong-Un ordered "substantial and high-profile important state measures," fuelling speculation of an imminent detonation.

Military chief Hyon Yong-Chol, the head of the army's politburo Choe Ryong-Hae and spy chief Kim Won-Hong attended the meeting, state television reported on Sunday.

Last week's UN resolution imposing sanctions threatened further "significant action" if Pyongyang conducted a nuclear test.

The North's two previous detonations in 2006 and 2009 followed a similar pattern of a missile launch, followed by UN measures, followed by a nuclear test.

US warnings about the consequences of a third test have been backed by unusually strident criticism of Pyongyang by its sole major ally China.

Last week, a state-run newspaper close to China's ruling Communist Party, said in an editorial that Beijing would "not hesitate" to reduce aid to North Korea if it went ahead.

China has been the primary benefactor of Pyongyang since the 1950-1953 Korean War, providing critical diplomatic and economic support.

- AFP/al

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In burned club, cell phones ring with calls for the dead

Hundreds dead in Brazil nightclub fire

Hundreds dead in Brazil nightclub fire

Hundreds dead in Brazil nightclub fire

Hundreds dead in Brazil nightclub fire

Hundreds dead in Brazil nightclub fire

Hundreds dead in Brazil nightclub fire

Hundreds dead in Brazil nightclub fire

Hundreds dead in Brazil nightclub fire

Hundreds dead in Brazil nightclub fire

Hundreds dead in Brazil nightclub fire

Hundreds dead in Brazil nightclub fire

Hundreds dead in Brazil nightclub fire

Hundreds dead in Brazil nightclub fire

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STORY HIGHLIGHTS

• Cell phones left in the club ring, go unanswered amid the ruins


• The club's license had expired in August and had not been renewed


• At least 80 of those killed were students at the Federal University of Santa Maria

Are you there? Share your story.

Santa Maria, Brazil (CNN) -- Workers combing through the charred wreckage of Kiss nightclub in southern Brazil on Sunday encountered the eerie sound of ringing cell phones.

Glauber Fernandes, a reporter from CNN affiliate Band News, explains.

"It was a really complicated scene. A lot of smoke, a lot of shoes that was left, cell phones, because everybody tried to get out of there running," he said. "While we were there, we saw the cell phones were ringing. It was parents, friends, trying to know about what was happening and nobody was answering."

A fire swept through the packed, popular nightclub in Santa Maria early Sunday, killing at least 233 people -- enough to fill a large plane -- Brazilian Health Minister Alexandro Padilha told reporters. Of those, 185 have been identified so far.

Many apparently died from smoke inhalation. Others were trampled in the rush for the exits, one security guard told Band News.

More than 90 people were hospitalized, Padilha said, including 14 patients with severe burns.

Deadly blazes: Nightclub tragedies in recent history

About 2,000 people were inside the club when the fire broke out -- double the maximum capacity of 1,000, said Guido de Melo, a state fire official.

Investigators have received preliminary information that security guards stopped people from exiting the club, he told Globo TV.

"People who were inside the facility informed us ... that security guards blocked the exit to prevent people there from leaving, and that's when the crowd starting panicking, and the tragedy grew worse," he said.

The fire started "from out of nowhere" on a stage at the club and quickly spread to the ceiling, witness Jairo Vieira told Band News.

"People started running," survivor Luana Santos Silva told Globo TV. "I fell on the floor."

There was a pyrotechnics show going on inside the club when the fire started. Authorities stopped short of blaming it for the blaze, saying the cause was still under investigation.

The Kiss nightclub is popular with young people in Santa Maria, which is home to a number of universities and colleges, including the Federal University of Santa Maria. At least 80 of those killed Sunday were students at that school, it said.

The blaze broke out during a weekend when students were celebrating the end of summer. Many universities are set to resume classes on Monday.

Video from the scene showed firefighters shooting streams of water at the club and shirtless men trying to break down a wall with axes.

Smoke billowed outside the front of the building as the stench of fire filled the air, said Max Muller, who was riding by on his motorbike when he saw the blaze.

Muller recorded video of a chaotic scene outside the club, which showed emergency crews tending to victims and dazed clubgoers standing in the street. Bodies lay on the ground beside ambulances.

Friends who were inside the club told him that many struggled to find the exits in the dark. Muller, who was not inside the club Sunday morning but has been there twice before, said there were no exit signs over the doors. It is rare to see such signs in Brazilian clubs.

Valderci Oliveira, a state lawmaker, told Band News that he saw piles of bodies in the club's bathroom when he arrived at the scene hours after the blaze. It looked "like a war zone," he said.

Read more: How to protect yourself in a crowd

Police told Band News that 90% of the victims were found in that part of the club.

The roof collapsed in several parts of the building, trapping many inside, said Fernandes, the reporter from Band News.

For others, escaping was complicated by the fact that guards initially stopped people from leaving, he said, echoing comments from the state fire official.

"Some guards thought at first that it was a fight, a huge fight that happened inside the club and closed the doors so that the people could not leave without paying their bills from the club," Fernandes said.

The deadly fire is sure to shine a spotlight on safety in Brazil, which is set to host the World Cup next year and the Olympics in 2016.

Many wept as they searched for information outside a local gymnasium where bodies were taken for identification later Sunday. Inside, Brazilian President Dilma Rousseff met with family members and friends as they waited on bleachers for word of their loved ones.

Rousseff became teary-eyed as she spoke of the fire to reporters in Chile earlier Sunday. She had been attending a regional summit there, but cut short the trip and returned to Brazil early to deal with the aftermath of the tragedy.

"The Brazilian people are the ones who need me today," she said. "I want to tell the people of Santa Maria in this time of sadness that we are all together."

The fire started around 2 a.m. after the acoustic insulation in the Kiss nightclub caught fire, said Civil Defense Col. Adilomar Silva.

An accordionist who had been performing onstage with a band when the blaze broke out was among the dead, drummer Eliel de Lima told Globo TV.

Police were questioning the club's owner and interviewing witnesses as part of an investigation into what caused the blaze, state-run Agencia Brasil reported.

The club's license had expired in August and had not been renewed, local fire official Moises da Silva Fuchs told Globo TV.

The incident called to mind a 2003 nightclub fire in Rhode Island where pyrotechnics used by the heavy metal band Great White ignited a blaze that killed 100 people.

Pyrotechnics were also involved in a 2004 nightclub fire in Argentina that killed 194 people and a 2009 explosion at a nightclub in Russia that left more than 100 dead.

Shasta Darlington reported from Santa Maria, Brazil. Marilia Brocchetto and Dana Ford reported from Atlanta. CNN's Catherine E. Shoichet, Helena DeMoura and Samira Jafari contributed to this report.

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Massive loss of life in Brazil nightclub fire

Last Updated 5:17 p.m. ET

BRASILIA, Brazil Flames raced through a crowded nightclub in southern Brazil early Sunday, killing more than 230 people as panicked partygoers gasped for breath in the smoke-filled air, stampeding toward a single exit partially blocked by those already dead. It appeared to be the world's deadliest nightclub fire in more than a decade.

Witnesses said a flare or firework lit by band members started the blaze in Santa Maria, a university city of about 225,000 people, though officials said the cause was still under investigation.

17 Photos

More than 200 die in Brazil nightclub fire

Television images showed smoke pouring out of the Kiss nightclub as shirtless young men who had attended a university party joined firefighters using axes and sledgehammers to pound at windows and walls to free those trapped inside.

Guido Pedroso Melo, commander of the city's fire department, told the O Globo newspaper that firefighters had a hard time getting inside the club because "there was a barrier of bodies blocking the entrance."

Teenagers sprinted from the scene desperately seeking help. Others carried injured and burned friends away in their arms.

"There was so much smoke and fire, it was complete panic, and it took a long time for people to get out, there were so many dead," survivor Luana Santos Silva told the Globo TV network.

The fire spread so fast inside the packed club that firefighters and ambulances could do little to stop it, Silva said.

A man carries an injured man, victim of a fire at the Kiss club in Santa Maria, Brazil, early Sunday, Jan. 27, 2013.

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AP Photo/Agencia RBS

Another survivor, Michele Pereira, told the Folha de S. Paulo newspaper that she was near the stage when members of the band lit flares that started the conflagration.

"The band that was onstage began to use flares and, suddenly, they stopped the show and pointed them upward," she said. "At that point, the ceiling caught fire. It was really weak, but in a matter of seconds it spread."

Guitarist Rodrigo Martins told Radio Gaucha that the band, Gurizada Fandangueira, started playing at 2:15 a.m. "and we had played around five songs when I looked up and noticed the roof was burning"

"It might have happened because of the Sputnik, the machine we use to create a luminous effect with sparks. It's harmless, we never had any trouble with it.

"When the fire started, a guard passed us a fire extinguisher, the singer tried to use it but it wasn't working"

He confirmed that accordion player Danilo Jacques, 28, died, while the five other members made it out safely.

Police Maj. Cleberson Braida Bastianello said by telephone that the toll had risen to 233 with the death of a hospitalized victim. Officials counted 232 bodies that had been brought for identification to a gymnasium in Santa Maria, a major university city with about 250,000 residents at the southern tip of Brazil, near the borders with Argentina and Uruguay.

An earlier count put the number of dead at 245.

Federal Health Minister Alexandre Padhilha told a news conference that most of the 117 people treated in hospitals had been poisoned by gases they breathed during the fire. Only a few suffered serious burns, he said.

Brazil President Dilma Roussef arrived to visit the injured after cutting short her trip to a Latin American-European summit in Chile.

"It is a tragedy for all of us," Roussef said.

Most of the dead apparently suffocated, according to Dr. Paulo Afonso Beltrame, a professor at the medical school of the Federal University of Santa Maria who went to the city's Caridade Hospital to help victims.

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Brazil Nightclub Fire: 232 Dead, Hundreds Injured

Flames raced through a crowded nightclub in southern Brazil early Sunday, killing more than 230 people as panicked partygoers gasped for breath in the smoke-filled air, stampeding toward a single exit partially blocked by those already dead. It appeared to be the world's deadliest nightclub fire in more than a decade.

Witnesses said a flare or firework lit by band members started the blaze in Santa Maria, a university city of about 225,000 people, though officials said the cause was still under investigation.

Television images showed smoke pouring out of the Kiss nightclub as shirtless young men who had attended a university party joined firefighters using axes and sledgehammers to pound at windows and walls to free those trapped inside.

Guido Pedroso Melo, commander of the city's fire department, told the O Globo newspaper that firefighters had a hard time getting inside the club because "there was a barrier of bodies blocking the entrance."

Teenagers sprinted from the scene desperately seeking help. Others carried injured and burned friends away in their arms.

"There was so much smoke and fire, it was complete panic, and it took a long time for people to get out, there were so many dead," survivor Luana Santos Silva told the Globo TV network.

The fire spread so fast inside the packed club that firefighters and ambulances could do little to stop it, Silva said.

Germano Roratto/AFP/Getty Images

Another survivor, Michele Pereira, told the Folha de S. Paulo newspaper that she was near the stage when members of the band lit flares that started the conflagration.

"The band that was onstage began to use flares and, suddenly, they stopped the show and pointed them upward," she said. "At that point, the ceiling caught fire. It was really weak, but in a matter of seconds it spread."

Guitarist Rodrigo Martins told Radio Gaucha that the band, Gurizada Fandangueira, started playing at 2:15 a.m. "and we had played around five songs when I looked up and noticed the roof was burning"

"It might have happened because of the Sputnik, the machine we use to create a luminous effect with sparks. It's harmless, we never had any trouble with it.

"When the fire started, a guard passed us a fire extinguisher, the singer tried to use it but it wasn't working"

He confirmed that accordion player Danilo Jacques, 28, died, while the five other members made it out safely.

Police Maj. Cleberson Braida Bastianello said by telephone that the toll had risen to 233 with the death of a hospitalized victim — he said earlier that the death toll was likely made worse because the nightclub appeared to have just one exit through which patrons could exit.

Officials counted 232 bodies that had been brought for identification to a gymnasium in Santa Maria, which is located at the southern tip of Brazil, near the borders with Argentina and Uruguay.

Federal Health Minister Alexandre Padhilha told a news conference that most of the 117 people treated in hospitals had been poisoned by gases they breathed during the fire. Only a few suffered serious burns, he said.

Brazil President Dilma Rousseff arrived to visit the injured after cutting short her trip to a Latin American-European summit in Chile.

"It is a tragedy for all of us," Rousseff said.

Most of the dead apparently were asphyxiated, according to Dr. Paulo Afonso Beltrame, a professor at the medical school of the Federal University of Santa Maria who went to the city's Caridade Hospital to help victims.

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Get cirrus in the fight against climate change

FEATHERY cirrus clouds are beautiful, but when it comes to climate change, they are the enemy. Found at high-altitude and made of small ice crystals, they trap heat - so more cirrus means a warmer world. Now it seems that, by destroying cirrus, we could reverse all the warming Earth has experienced so far.

In 2009, David Mitchell of the Desert Research Institute in Reno, Nevada, proposed a radical way to stop climate change: get rid of some cirrus. Now Trude Storelvmo of Yale University and colleagues have used a climate model to test the idea.

Storelvmo added powdered bismuth triiodide into the model's troposphere, the layer of the atmosphere in which these clouds form. Ice crystals grew around these particles and expanded, eventually falling out of the sky, reducing cirrus coverage. Without the particles, the ice crystals remained small and stayed up high for longer.

The technique, done on a global scale, created a powerful cooling effect, enough to counteract the 0.8 °C of warming caused by all the greenhouse gases released by humans (Geophysical Research Letters, DOI: 10.1002/grl.50122).

But too much bismuth triiodide made the ice crystals shrink, so cirrus clouds lasted longer. "If you get the concentrations wrong, you could get the opposite of what you want," says Storelvmo. And, like other schemes for geoengineering, side effects are likely - changes in the jet stream, say.

Different model assumptions give different "safe" amounts of bismuth triiodide, says Tim Lenton of the University of Exeter, UK. "Do we really know the system well enough to be confident of being in the safe zone?" he asks. "You wouldn't want to touch this until you knew."

Mitchell says seeding would take 140 tonnes of bismuth triiodide every year, which by itself would cost $19 million.

If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.

All comments should respect the New Scientist House Rules. If you think a particular comment breaks these rules then please use the "Report" link in that comment to report it to us.

If you are having a technical problem posting a comment, please contact technical support.

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Major floods hammer northern Australia

SYDNEY: A man was missing in raging floodwaters and hundreds of homes were evacuated in northeastern Australia as storms pelted Queensland state on Sunday, with the army put on standby as the weather worsened.

Towns and cities devastated by floods in Queensland two years ago which claimed 35 lives were bracing for another devastating inundation as ex-tropical cyclone Oswald hammered the state.

A 27-year-old man was missing after he attempted to cross a swollen creek near Gympie north of Brisbane and a swift-water rescue team lost their boat trying to retrieve him, according to the town's mayor Ron Dyne.

Dyne said a number of people had taken refuge on the roofs of their homes awaiting rescue from the rising waters, with the centre of Gympie expected to flood later Sunday.

"At this stage, we've got major concerns," said Dyne.

"Everything's occurred rather rapidly given the amount of rain we've had."

A woman was airlifted to safety in Biloela, about 600 kilometres northwest of Brisbane, after spending eight hours in floodwaters clinging to the branches of a tree.

Also in the north, major flooding was expected in the towns of Bundaberg and Gladstone, with hundreds of homes and businesses at risk, some of which had only just been rebuilt following the 2011 floods.

At least one international flight was diverted from Brisbane to Sydney due to the high winds, and Qantas has cancelled a number of domestic services.

About 900 homes had been evacuated in the Gladstone region and about 100 backpackers were sheltering in a community centre at Rainbow Beach after being removed from Fraser Island, according to Dyne.

Queensland Premier Campbell Newman said the army was on standby to assist in the unfolding emergency.

"The challenge now is that we've got multiple events going on," Newman told reporters, adding that he had spoken with Prime Minister Julia Gillard.

"It's likely that we're going to need members of the Australian Defence Force to help with both potentially rescuing people or protecting people, but certainly with clean-up operations."

The weather bureau said there had been damaging winds and reports of "possible tornado activity" throughout southeastern Queensland overnight and warned that further storms were likely.

Disaster management officials said there had been more than 800 emergency calls in the 24 hours to 5am on Sunday, mostly for lost or damaged roofs or requests for sandbags to protect property.

Cyclones and floods are common in Australia's northeast during the warmer summer months. A massive inundation of Queensland in 2011 killed 35 people and brought Brisbane to a standstill for several days, swamping some 30,000 homes.

- AFP/fa

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U.S. steps up military involvement in Mali

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

Mali military battles Islamist insurgents

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STORY HIGHLIGHTS

• NEW: United States agrees to conduct aerial refueling missions, to transport troops


• Malian and French forces recapture the city of Gao, a stronghold of the Islamic militants


• The Malian offensive is backed by French forces

(CNN) -- The United States is intensifying its involvement in Mali, where local and French forces are battling Islamic militants.

It will support the French military by conducting aerial refueling missions, according to the Pentagon, which released a short statement Saturday following a call between Defense Secretary Leon Panetta and French Defense Minister Jean-Yves Le Drian.

"The leaders also discussed plans for the United States to transport troops from African nations, including Chad and Togo, to support the international effort in Mali. Secretary Panetta and Minister Le Drian resolved to remain in close contact as aggressive operations against terrorist networks in Mali are ongoing," it read.

U.S. policy prohibits direct military aid to Mali because the fledgling government is the result of a coup. No support can go to the Malian military directly until leaders are chosen through an election.

But the United States is supporting the effort with intelligence and airlift support.

So far, the U.S. Air Force has flown at least seven C-17 cargo missions into Mali, carrying 200 passengers, mainly French troops, and 168 tons of equipment, according to Maj. Robert Firman, a Pentagon spokesman.

The uptick in U.S. involvement comes as Malian forces loosened the grip that Islamist militants' hold in the country's north with the retaking of the city of Gao.

With the support of French forces, the Malians entered and took control of Gao, which for months had been a militant stronghold, the French defense ministry said.

The advance was made in stages, with forces taking Gao's airport and the main bridge leading to town before entering the rest of the city.

"Jihadist terrorists, who have fought Malian and French armies, have seen their mobile and logistical capabilities reduced," the ministry said in a news release.

The quickening advance of the government forces has brought them to the heart of the territory held by the militants.

Broken limbs, torn lives in northern Mali

The Islamic extremists carved out a large haven in northern Mali last year, taking advantage of a chaotic situation after a military coup by the separatist party MNLA. The militants banned music, smoking, drinking and watching sports on television. They also destroyed historic tombs and shrines.

The takeover stoked fear among global security experts that Mali could become a new hub for terrorism.

Refugees tell harrowing stories of life under the Islamist militants.

But the French-based International Federation for Human Rights said it is "very alarmed" by reports that Malian soldiers are themselves carrying out extrajudicial killings and abuses as they counterstrike.

The United Nations' refugee agency, UNHCR, has called for an increase in international aid for the hundreds of thousands of people who have been displaced by the fighting in the country.

More signs al Qaeda in Mali orchestrated Algeria attack

More than 150,000 refugees have fled Mali into neighboring countries, and another 230,000 are displaced inside Mali, the agency said.

The military's advance into Gao may shed more light on the conditions that residents there have faced. According to the U.N. agency, one former resident told of a hospital stripped of medicine by the armed militants and filling with bodies.

As the Malian troops advance, some other countries in the region are joining the French force aiding them. Between 700 and 800 African troops from Benin, Nigeria, Togo and Burkina Faso have arrived, U.S. State Department spokeswoman Victoria Nuland said Friday, and a number of Senegalese troops and up to 2,000 from Chad are on the way.

France has 2,150 soldiers on Malian soil, with 1,000 more troops supporting the operation from elsewhere.

French involvement in the conflict began on January 11, the day after militants said they had seized the city of Konna, east of Diabaly in central Mali, and were poised to advance south toward Bamako, the capital.

Until 1960, Mali had been under French control.

The MNLA, made up of ethnic Tuareg rebels, staged their coup against Mali's central government after returning to Mali well-armed from fighting for late Libyan leader Moammar Gadhafi.

Mali's famed Timbuktu without water, other services

CNN's Pierre Meilhan and Barbara Starr contributed to this report.

Read More..

Egypt: Deadly clashes follow soccer riot verdict

Last Updated 4:48 p.m. ET

CAIRO Relatives and angry young men rampaged through the Egyptian city of Port Said on Saturday in assaults that killed at least 27 people following death sentences for local fans involved in the country's worst bout of soccer violence.

Unrest surrounding the second anniversary of Egypt's revolution also broke out in Cairo and other cities for a third day, with protesters clashing for hours with riot police who fired tear gas that encompassed swaths of the capital's downtown.

The divisive verdict and bloodshed highlight challenges being faced by President Mohammed Morsi, who took office seven months ago following an Egyptian revolution that ousted autocratic leader Hosni Mubarak. Critics say Morsi has failed to carry out promised reforms in the country's judiciary and police force, and claim little has improved in the two years after the uprising against Mubarak.

The Islamist leader, Egypt's first freely elected and civilian president, met for the first time with top generals as part of the newly formed National Defense Council to discuss the deployment of troops in two cities. The military was deployed to Port Said hours after the verdict was announced, and warned that a curfew could be declared in areas of unrest. The military was also deployed to the canal city of Suez, where protesters attacked the main security compound there after eight people were killed late Friday.

Smoke billows from a burning minibus belonging to a satellite channel after it was set on fire by Egyptian protesters outside the prison in Port said, Egypt, January 26, 2013. Twenty-one Egyptian football fans and club members were sentenced to death after a fatal post-match riot in Port Said last year, sparking new violence in the canal city that killed eight.

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AFP/Getty Images

Saturday's riot in Port Said stemmed from animosity between police and die-hard soccer fans know as Ultras, who also were part of the mass uprising against Mubarak that began on Jan. 25, 2011, and at forefront of protests against the military rulers who assumed temporary power after his ouster.

It also reflected tensions after the uprising that reached into all sectors of Egyptian life, even sports.

Survivors and witnesses said Mubarak loyalists had a hand in instigating last year's attack, which began Feb. 1 after Port Said's home team Al-Masry won a match, 3-1, against Cairo's Al-Ahly. Some say "hired thugs" wearing green T-shirts posing as Al-Masry fans led the attacks.

Others say, at the very least, police were responsible for gross negligence in the Feb. 1 soccer brawl that killed 74 Al-Ahly fans.

Families of the victims who died in last year's soccer violence react in court after the issuance of the death penalty for 21 accused in the Port Said incident, in Cairo, Egypt, Saturday, Jan. 26, 2013.

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AP/Ahmed Abd El-Latef, Shorouk Newspaper

Anger at police was evident in Port Said, home to most of the 73 men accused of involvement in the bloodshed, although the trial was held outside Cairo.

Judge Sobhi Abdel-Maguid did not give his reasoning when he handed down the sentences for 21 defendants. Executions in Egypt are usually carried out by hanging.

Verdicts for the remaining 52 defendants, including nine security officials, are scheduled to be delivered March 9. Some have been charged with murder and others with assisting the attackers. All the defendants — who were not present in the courtroom Saturday for security reasons — can appeal the verdict.

Supporters of those sentenced to death said they were being used as scapegoats. The rioters attacked the city's prison after the verdict was read live on state television to try and free the defendants. A police lieutenant and police officer were killed in the assault.

Residents also focused their anger against the government, attacking a power station, the governor's office and local courthouse. They staged a sit-in along the main road leading into the city and occupied a police station.

Security officials said a total of 27 people were killed and some 400 wounded, many by gunfire, throughout the city. The officials spoke on condition of anonymity because they weren't authorized to release the information.

Victims were killed when police fired tear gas, bird shot and other live ammunition at the mob. Two soccer players who died- one from Port Said's Al-Marikh club and the other a former player of its Al-Masry club — apparently were killed on their way to do training near the prison. One of the players was shot three times, a local health official said.

Some 220 kilometers (135 miles) away in Cairo, the divisive nature of the trial was on display.

Relatives of those killed at the soccer game erupted in joy in the courtroom after the verdict was announced.

Families yelled "Allahu Akbar!" Arabic for "God is great" and pumped their fists in the air. Others held up pictures of the deceased, most of whom were young men from Cairo's poor neighborhoods. One man fainted while others hugged. The judge smacked the bench several times to try to restore calm.

Supporters of Cairo's Al-Ahly celebrated the verdict in the team's club before heading toward Interior Ministry headquarters, which manages the police, for more protests.

Lawmakers had formed a fact-finding committee that found some evidence toward collusion from authorities, but the evidence was not conclusive.

Nine of those on trial are security officials, charged with assisting the attackers for failing to search for weapons as is customary and allowing known criminals to attend the game. One was a senior officer who locked the exit designated for Al-Ahly fans. Many victims suffocated or were trampled to death in the corridor trying to escape the violence. Others were thrown off bleachers, undressed, beaten with iron bars and had the words "Port Said" carved into their skin.

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Newtown Families March for Gun Control in DC

Jan 26, 2013 4:59pm

(YURI GRIPAS/AFP/Getty Images)

WASHINGTON, D.C. — Near-freezing temperatures didn’t stop several thousand gun-control activists from bearing their pickets today, carrying signs emblazoned with “Ban Assault Weapons Now” and the names of gun violence victims in a demonstration organized as a response to the mass shooting in Newtown, Conn. last month.

Walking in silence, the demonstrators trudged between Capitol Hill and the Washington Monument over a thin layer of melting snow. They were joined by politicians and some families of the Newtown victims.

March organizer Shannon Watts said the event was for the “families who lost the lights of their lives in Newtown, daughters and sons, wives and mothers, grandchildren, sisters and brothers gone in an unfathomable instant.”

“Let’s stand together and use our voices, use our votes to let legislators know that we won’t stand down until they enact common sense gun control laws that will keep our children out of the line of fire,” she told demonstrators.

Watts founded One Million Moms for Gun Control after the killing of 20 first graders and six adults at the Sandy Hook Elementary School in Newtown in December. In a profile with the New York Times, Watts said her 12-year-old son had suffered panic attacks after learning of last summer’s Aurora, Colo., theater shooting, leaving her at an impasse over how to talk to him about the latest tragedy.

Also among the speakers was a survivor of the 2007 Virginia Tech massacre, Collin Goddard.

“We need to challenge any politician who thinks it’s easier to ask an elementary school teacher to stand up to a gunman with an AR-15 than it is to ask them to stand up to a gun lobbyist with a checkbook,” he said.

The demonstration comes amid a push by progressive lawmakers to enact stricter gun control measures as a response to the trend of recent mass killings, although any hypothetical bill would likely face strong opposition in Congress.

Rep. Chris Van Hollen, D-Md., was among the demonstrators today.

“The idea that people need high-capacity magazines that can fire 30, 50, 100 rounds has no place in a civilized society,” he said. “Between the time we’re gathered here right now and this time of day tomorrow, across America, 282 Americans will have been shot.”

The congressman was quoting statistics compiled by the Brady Campaign to Stop Gun Violence.

INFOGRAPHIC: Guns by the Numbers

Last week President Obama proposed a sweeping overhaul of federal measures regulating gun ownership, including a universal background check system for sales, banning assault weapons,  and curbing the amount of ammunition available in weapon clips.

An ABC News/Washington Post poll released Thursday found 53 percent of Americans viewed Obama’s gun control plan favorably, 41 percent unfavorably. The division was visible today, as a handful of gun-rights advocates also turned out on the National Mall to protest what they believe would be infringements on their Second Amendment liberties.

ABC’s Joanne Fuchs contributed to this report.

SHOWS: Good Morning America World News

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