Human hands evolved so we could punch each other

Forget toolmaking, think fisticuffs. Did evolution shape our hands not for dexterity but to form fists so we could punch other people? That idea emerges from a new study, although it runs counter to conventional wisdom.

About the same time as we stopped hanging from trees and started walking upright, our hands become short and square, with opposable thumbs. These anatomical changes are thought to have evolved for tool manipulation, but David Carrier at the University of Utah in Salt Lake City has an alternative explanation.

He says there are several possible hand shapes that would have allowed greater dexterity, making it less clear why we ended up with the hands we have. But only one hand shape lets us make a fist with a thumb as buttress.

Among primates' hands, ours is unique for its ability to form a fist with the thumb outside the fingers. The fingers of other primates' hands are too long to curl into their palms, and their thumbs are too short to reach across the fingers. So when apes fight, they are far more likely to wrestle or hold their opponent down while others stomp on him, says Carrier.

To test the importance of fists, Carrier and his colleagues recruited 10 athletes and measured how hard they could hit a punching bag using a normal fist, a fist with the thumb stuck out, and with an open palm.

The athletes could generate more than twice the force with a normal fist as with the thumb-stuck-out fist, because of thumb's buttressing role. There was no difference in the force they could generate with a normal fist and with an open palm, but Carrier says it's possible that a fist concentrates the force into a smaller area and so does more damage.

Cause or effect?

Mary Marzke of Arizona State University in Tempe says the study is interesting, but it far from proves that the ability to make a strong fist was the main driver behind the evolution of our hands' shape. It is more likely that it was a useful side effect of a whole suite of modifications.

She points out that apes strike with the heel of their hand when knocking fruit out of trees. Carrier's study didn't assess the force that the heel of the hand generates, but if it turns out to be as good as a fist, it becomes less clear that our hands evolved so as to be perfect for fist-making, Marzke says.

But if the hypothesis is true, Carrier thinks it could explain another mystery. It has long been unclear why high levels of testosterone cause men's ring fingers to be longer than their index fingers. He says the finger-length ratio makes sense if it generates a better fist. This would make dominant males even better fighters.

Journal reference: Journal of Experimental Biology, doi:10.1242/jeb.075713

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More employers offering work-life arrangements

SINGAPORE: More employers in Singapore are offering work-life arrangements, according to a survey conducted by the Ministry of Manpower (MOM).

In 2012, 41 per cent of establishments offered at least one form of work-life arrangement to their employees, up from 38 percent in 2011.

Working part-time was the most common work-life arrangement offered by 33 per cent of establishments.

At a distant second was flexitime (8.2%), followed by staggered hours (7.5%) and tele-working (4.0%).

These were some of the key findings from the 2012 Conditions of Employment Survey conducted by MOM's Research and Statistics Department.

The survey covered 3,500 establishments in the private sector -- each with at least 25 employees -- and the public sector. The response rate was 91 per cent.

The survey also found that increasingly, employers were going beyond statutory requirements to provide various leave benefits to help their employees cope with family commitments.

Most establishments gave compassionate leave (89%) and marriage leave (73%). Slightly over half granted paternity leave (53%), 36 per cent provided study/examination leave, while 16 per cent gave parental care/sick leave.

The 5-day work-week continued to be the norm, with 44 per cent of full-time employees in 2012 under such a work-week arrangement.

Lagging significantly behind were shift work (17%), 6-day (18%) and 5-1/2-day work-week (14%).

Absenteeism due to illness was broadly stable over the years. In 2011, 58 per cent of employees took outpatient sick leave and 4.2 per cent took hospitalisation leave. These were broadly comparable to 55 per cent and 4.3 per cent respectively in 2009.

- CNA/al

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Obama: 'Take the deal'

STORY HIGHLIGHTS

• White House threatens to veto Boehner's "plan B"


• President Obama suggests Republicans are fixated on besting him personally


• Speaker Boehner says the House will pass his fallback tax plan Thursday


• Without a deal, everyone's taxes go up in the new year

Washington (CNN) -- After progress earlier this week in fiscal cliff negotiations, President Barack Obama and House Speaker John Boehner butted heads Wednesday, setting the stage for a showdown as the deadline looms for an agreement.

The negotiations had focused on a $2 trillion package of new revenue, spending cuts and entitlement changes the two sides have shaped into a broad deficit reduction plan.

Boehner on Tuesday proposed a "plan B," which would extend Bush-era tax cuts on income of up to $1 million. He described it as a fallback option to prevent a sweeping tax hike while negotiations continue on a broader plan.

But the White House on Wednesday threatened to veto "plan B," saying it would bring only "minimal" changes in projected budget deficits.

Obama told reporters earlier in the day that Republicans were focused too much on besting him personally rather than thinking about what's best for the country.

"Take the deal," Obama said to Republicans, referring to the broader proposal, adding that it would "reduce the deficit more than any other deficit reduction package" and would represent an achievement.

"They should be proud of it," Obama said. "But they keep on finding ways to say 'no' as opposed to finding ways to say 'yes.' "

His comments at a White House news conference came less than two weeks before the end of the year, when the nation's taxpayers would face automatic tax increases and deep spending cuts if no agreement is reached.

Economists say that failure to reach agreement could spark another recession.

Boehner issued his own statement Wednesday, saying the president had yet to make a proposal offering a balance between increased revenue and spending cuts.

In a 52-second appearance before reporters, Boehner said the House will pass his fallback plan Thursday limiting tax increases to income above $1 million.

While the plan represents a concession from Boehner's original vow to oppose any tax-rate increase, it sets a higher threshold than the $400,000 sought by Obama.

Once the House passes his plan, the president can either persuade Senate Democrats to accept it or "be responsible for the largest tax increase in American history," Boehner said before walking off without answering shouted questions.

The Obama administration and congressional Democrats said Boehner changed course because he was unable to muster Republican support for the larger deal being negotiated with Obama.

At his news conference, Obama alluded to last Friday's Connecticut school shootings in calling on Republicans to put aside political brinksmanship. "If there's one thing we should have after this week, it should be perspective about what's important," he said.

"Right now, what the country needs is for us to compromise," he continued. He characterized as "puzzling" the GOP refusal to accept his compromise.

Asked why an agreement was proving so elusive after both sides had made concessions, Obama said it might be that "it is very hard for them to say 'yes' to me."

"At some point they've got to take me out of it," Obama said of Republicans, adding they should instead focus on "doing something good for the country."

Boehner responded by arguing that Obama's proposal was not evenly balanced, with more new revenue instead of the spending cuts and entitlement reforms Republicans seek.

The Boehner plan B would leave intact government spending cuts, including those related to defense, which are required under a budget deal reached last year to raise the federal debt ceiling. The threat of cuts was intended to motivate Congress to reach a deal.

Opinion: Art that calls the fiscal cliff's bluff

But Obama said Wednesday that Boehner's proposal "defies logic" because it raises tax rates on some Americans, which Republicans say they do not want, and contains no spending cuts, which Republicans say they do want.

He also criticized the measure as a benefit for wealthy Americans, who would have lower tax rates on income up to $1 million.

The White House and congressional Democrats say plan B has no chance of passing; Obama said that bringing it up only wastes time.

Senior administration officials said Obama and Boehner have not spoken to each other since Monday. GOP leaders planned to vote Thursday on Boehner's proposal, as well as Obama's long-standing proposal to return to higher tax rates of the 1990s on income above $250,000 for families.

Obama on Monday raised the threshold for the higher tax rates to $400,000.

Conservative allies publicly supported Boehner's plan Wednesday.

Anti-tax crusader Grover Norquist provided political cover for Republicans who have signed his pledge against tax increases, saying he could support plan B.

Obama and Democrats argue that increased revenue, including higher tax rates on the wealthy, must be part of broader deficit reduction plan.

Obama made the tax proposal a theme of his re-election campaign, arguing that it would prevent a tax increase for middle-class Americans.

Polls show support for the Obama plan, and some Republicans have called for acceding to the president on the tax issue in order to focus on cuts to spending and entitlement programs.

Budget experts: Fiscal cliff deal could disappoint

Boehner and Republicans initially opposed any rise in tax rates but agreed to raising revenue by eliminating some deductions and loopholes. The offer of a plan with higher rates for millionaires represented a further concession, but Obama and Democrats say it would not suffice.

Senate Majority Leader Harry Reid of Nevada said Boehner's plan appeared to be a result of pressure from tea party conservatives opposing a wider deal.

"It would be a shame if Republicans abandoned productive negotiations due to pressure from the tea party, as they have time and again," Reid said this week.

Boehner's spokesman, Michael Steel, shot back that the plan B proposal gave Democrats what they wanted -- higher tax rates on millionaires.

What happens if the payroll tax cut expires

Obama's latest offer has generated protests from the liberal base of the Democratic Party because it includes cuts in entitlement programs such as Social Security, Medicare and Medicaid.

Justin Ruben, executive director of MoveOn, which backed Obama's presidential campaigns, said its members would consider any benefit cuts "a betrayal that sells out working and middle-class families."

In particular, liberals cited concessions that Obama made Monday in his counteroffer, including a new inflation formula applied to benefits called chained CPI.

Obama offers fiscal cliff tax concession

Chained CPI includes assumptions on consumer habits in response to rising prices, such as seeking cheaper alternatives, and would result in smaller benefit increases in future years.

Statistics supplied by opponents say the change would mean Social Security recipients would get $6,000 less in benefits over the first 15 years of chained CPI.

But White House spokesman Jay Carney said Obama's CPI proposal "would protect vulnerable communities, including the very elderly, when it comes to Social Security recipients." He called the president's acceptance of the chained CPI a signal of his willingness to compromise.

CNN's Dan Lothian, Dana Bash, Deirdre Walsh and Brianna Keilar contributed to this report.

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More funerals for victims of Newtown shooting

(CBS News) NEWTOWN, Conn. - In Newtown, Connecticut, more children and a teacher -- victims of the deadly shooting at Sandy Hook Elementary School -- were laid to rest Wednesday.

Daniel Barden, 7, a victim in the mass shooting at Sandy Hook Elementary School in Newtown, Conn., Dec. 14, 2012.

/

Rex Features via AP Images

Firefighters from across the northeast came to honor seven-year-old Daniel Barden. He wanted to be a firefighter someday.

"The firefighters were here in tribute to this young child and all the souls that were lost in this community" said Eddy Bowls of New York.

Newtown massacre: Teacher Vicki Soto's heroics remembered
Complete coverage: Elementary School Rampage

Sandy Hook's fire department also stood at attention for Caroline Previdi's funeral procession. She loved to draw and dance.

Victoria Soto, a first grade teacher at Sandy Hook Elementary School, who was killed while protecting her students from a mass shooter on Dec. 14, 2012.

/

Sandy Hook

And at teacher Vicki Soto's funeral, the crowd was so large that people stood outside. Inside, singer Paul Simon performed "The Sound of Silence."

"It was just heartbreaking when you see the small casket," said family friend Joseph Secola. "You think the girl is six years old. But she obviously was a lovely girl who gave joy to a lot of people, and that is what they have to hold on to."

Charlotte Bacon, the seventh student to be laid to rest since the shooting, was remembered for her love of animals and the color pink.

There is still no clear evidence as to what triggered Adam Lanza's rampage. The medical examiner is bringing in a geneticist to see if Lanza might have had a medical condition that could have played a role in the shooting.

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Scammers Could Profit Off Sandy Hook Tragedy

Scammers may be looking to cash in on the public's generosity following the Sandy Hook massacre, the Better Business Bureau warned.

"It is a challenge to be on guard because public sympathy and emotions are running high," said Bennett Weiner, chief operating officer of the BBB Wise Giving Alliance, a group that helps charitable donors make informed decisions.

Weiner said it's difficult for scams to be detected in the first week following every national tragedy, however he suspects unscrupulous people are already out there, eager to cash in on the massacre.

How to Help Newtown Families

False websites or phone calls soliciting help for the victims' families are two of the easiest and most common scams Weiner said he sees.

"They're hard to identify because people don't know they've been taken and they're not going to know until down the road," he said.

Jahi Chikwendiu/The Washington Post/Getty Images

Newtown Children Return to School After Sandy Hook Massacre Watch Video

Sandy Hook Elementary School Shooting: Victims Laid to Rest Watch Video

Connecticut School Shooting: Children Among Multiple Fatalities Watch Video

After the Sandy Hook massacre, countless Facebook pages for the victims, listings on crowdfunding sites and community drives have been established to solicit donations.

Timeline: Tragedy At Sandy Hook

While many of them may be legitimate, Weiner warns people to do their research.

"You really have to be watching out for newly created things. There may be some well-intended effort, but you have no way to look at their track record," he said. "I can tell you from experience there are some cautions associated with it."

Any fundraising effort that makes vague statements, such as "we're going to help the victims and families," is another red flag to watch out for, Weiner said.

Whether it's fundraising for the Aurora theater victims or a local terminally ill child, Weiner said the BBB sees these kinds of scams "time and time again" and actively investigates them.

"It is a challenge to be on guard after a tragedy," he said. "But you shouldn't give to any organization without checking them out first."

Click Here for the Blotter Homepage.

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Today on New Scientist: 18 December 2012

Violent polar storms help control the world's weather

Without the mini-hurricanes which form over the Arctic, the world could face massive weather disruption

Ancient city of Troy rebranded itself after war

Changing styles of pottery 3200 years ago show the Trojans were quick to align themselves with the region's new political power

Court ruling will clarify end-of-life decisions

Canada's supreme court will soon rule on whether doctors can stop treatment for "unconscious" patients, but determining awareness remains a thorny issue

Colourful claw of tiny ocean predator

See a prizewinning photo of the claw of a Phronima: a tiny marine predator whose size belies its ferocity

Gaming chair mimics a full-motion simulator

If you can't afford a full-motion flight or car simulator, here's a cheap way of creating some of the same effects

How an ancient Egyptian code unmasked a cannibal star

Has a papyrus from the time of the pharaohs exposed the ghoulish habits of the baleful Demon Star? Stephen Battersby investigates

Best videos of 2012: Bonobo genius makes stone tools

Watch a creative bonobo fashion tools to retrieve hidden food, at number 9 in our countdown of the year's best videos

Is the obesity epidemic caused by too much sugar?

In Fat Chance, endocrinologist Robert Lustig argues that insidious changes to our eating habits have caused disruptions to our endocrine systems

'The idea we live in a simulation isn't science fiction'

If the universe is just a Matrix-like simulation, how could we ever know? Physicist Silas Beane thinks he has the answer

Fungal frog killer hops into crayfish

Crayfish are vulnerable to the same chytrid fungus already killing frogs all over the world. The discovery provides a clue to how the disease spreads

Read More..

Benghazi inquiry slams "grossly inadequate" security

WASHINGTON: A long-awaited inquiry into a deadly militant attack on the US mission in the Libyan city of Benghazi late Tuesday slammed State Department security arrangements there as "grossly inadequate".

But the months-long probe also found there had been "no immediate, specific" intelligence about a threat against the mission, which was overrun by dozens of heavily armed militants on September 11 who killed four Americans.

"Systemic failures and leadership and management deficiencies at senior levels within two bureaus of the State Department resulted in a Special Mission security posture that was inadequate for Benghazi and grossly inadequate to deal with the attack that took place," the damning report said.

The Accountability Review Board (ARB) also concluded "there was no protest prior to the attacks, which were unanticipated in their scale and intensity."

The attack has become fiercely politicized, with Republicans skewering the US administration for security failings as well as a possible cover-up over Al-Qaeda's role.

In the unclassified section of their report, the five-strong board added they believed every effort had been made to rescue ambassador Chris Stevens, who died in the attack -- the first US envoy killed on duty since 1979.

US Secretary of State Hillary Clinton said she accepted "every one" of the 29 recommendations made by the ARB, which has spent the last three months investigating the events of that night.

She also said the State Department was working with the Pentagon to "dispatch hundreds of additional Marine Security Guards to bolster our posts".

Repeated requests for additional support from embassy staff in both Benghazi and the Libyan capital Tripoli had been ignored, the report said.

The inquiry "found a pervasive realization among personnel who served in Benghazi that the Special Mission was not a high priority for Washington," the report added.

The Benghazi mission was also hampered by poor resources, and the reliance on armed "but poorly skilled" local militiamen from the February 17 Martyrs Brigade as well as local unarmed staff hired by a British company, Blue Mountain, was "misplaced", it said.

Clinton has now entrusted Deputy Secretary Tom Nides with heading up a team which met for the first time Tuesday to implement the report's recommendations.

The classified findings of the investigation were on Tuesday sent to members of two House and Senate committees.

ARB chairman, veteran diplomat Thomas Pickering, and team member Admiral Mike Mullen, the former chairman of the Joint Chiefs of Staff, will brief lawmakers on Wednesday behind closed doors.

The Benghazi report was sent by courier to Clinton at home on Monday, and she has read the highly-anticipated findings. But she will not be testifying herself this week after falling ill and being told by doctors to rest.

- AFP/al

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Sources: Report on Benghazi attack to cite security

By Elise Labott, CNN

updated 8:54 PM EST, Tue December 18, 2012

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

Attack on the U.S. Consulate in Libya

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STORY HIGHLIGHTS

• Bureau of Diplomatic Security to get the blame, two sources say


• Senior management "does not come out well at all," a source says


• An unclassified version of the report is expected to be released

Washington (CNN) -- An independent review of the September 11 attack on the U.S. Consulate in Benghazi criticizes the State Department's Bureau of Diplomatic Security for its work in Libya before the event in which four Americans were killed, two sources who have read the report told CNN Tuesday.

The senior management in charge of diplomatic security "does not come out well at all," said one of the sources.

Assistant Secretary of State Eric Boswell is head of diplomatic security and Deputy Assistant Secretary of State Charlene Lamb oversaw State Department decisions on security at the diplomatic outpost. Lamb testified before Congress about the security precautions; documents show Lamb denied repeated requests for additional security in Libya.

The review has been sent to Capitol Hill, and an unclassified version was expected to be released as well.

State Department: Clinton not dodging Benghazi hearings

The Accountability Review Board completed its investigation into the matter this week and sent a copy to Secretary of State Hillary Clinton for review. A classified version of the report was delivered Tuesday afternoon to members and staff of the committees on Capitol Hill that have jurisdiction over the State Department.

Veteran diplomat Thomas Pickering and former Joint Chiefs of Staff Chairman Adm. Mike Mullen, both members of the review board will brief members of the House Foreign Affairs and Senate Foreign Relations Committees in a classified setting about the report on Wednesday.

State Department spokeswoman Victoria Nuland told reporters Tuesday that Clinton, who is home recovering from a stomach virus and concussion, wrote a letter to members of Congress that will accompany the report being sent to Capitol Hill.

Clinton ordered the review in the aftermath of the attack, which claimed the lives of Ambassador J. Christopher Stevens and three other Americans. Such reports are mandated by Congress when Americans working on behalf of the United States government are killed overseas.

It was expected to present a detailed examination of the events that led to the attacks along with a set of recommendations on improving security at U.S. diplomatic facilities around the world.

Read more: Benghazi attack back in the spotlight

In a notice sent to all State Department employees Tuesday, the department explained how the report would be implemented once it was released.

"To implement the Board's recommendations, the Secretary has directed the Deputy Secretary for Management and Resources to lead the implementation team, supported by the Under Secretary for Political Affairs, the Under Secretary for Management, the Director General of the Foreign Service, the Executive Secretary and the Deputy Legal Advisor," the notice said.

Employees were told the implementation team met Tuesday and would continue to do so regularly to implement the recommendations of the board.

The politics surrounding the events that led to the report have claimed one political casualty, with U.S. Ambassador to the United Nations Susan Rice last week pulling her name from consideration to succeed Clinton. Some Republican senators had said they would put a hold on her nomination if President Barack Obama had submitted it, based on comments Rice made in the days after the attack.

In place of Clinton, Deputy Secretaries of State William Burns and Thomas Nides will testify before the House and Senate committees Thursday.

Part of complete coverage on

A gunman opened fire in a Connecticut school on December 14. Learn more about the victims - 20 of them children, officials say.

updated 6:02 AM EST, Tue December 18, 2012

Piers Morgan and gun rights advocate Philip Van Cleave debate gun control on the heels of the Newtown tragedy.

updated 12:35 PM EST, Tue December 18, 2012

Two schools, two attacks, two countries on the same day. But in China there were no fatalities: the attacker used a knife, not a gun.

updated 10:05 AM EST, Tue December 18, 2012

Does the brain contain clues about killers? CNN Chief Medical Correspondent Dr. Sanjay Gupta explores that question.

updated 6:15 AM EST, Tue December 18, 2012

Last week, Beijing's leading English-language newspaper, China Daily, begun publishing a weekly Africa edition targeting Africa's growing middle class.

updated 6:13 AM EST, Mon December 17, 2012

The North Korean leader may have departed from his father's style, but repression and malnutrition remain.

updated 10:16 AM EST, Mon December 17, 2012

CNN's Arwa Damon reports from inside Aleppo on a female Syrian war photographer breaking taboos in the name of freedom.

updated 3:57 PM EST, Fri December 14, 2012

The war has forced hundreds of thousands of people from their homes; the lucky ones have found shelter across the border in crammed camps.

As with all things London, there's no single style or form: shopping here is a glorious mishmash.

updated 10:35 PM EST, Thu December 13, 2012

Tensions with the U.S., the push to clean corruption and plans to land on the moon are trends to watch next year, writes Kristie Lu Stout.

Kaye Martindale and Geoff Brokate traveled through Pakistan for eight months photographing local women, including Malala Yousafzai.

updated 8:44 PM EST, Tue December 18, 2012

Apple's share price has fallen more than 25% since its record high set three months ago -- no less than five analysts have lowered their price targets.

Malala or Merkel? Zuckerberg or Baumgartner? Tell us the famous face who mattered most to you during the last 12 months.

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Texas school district encourages armed teachers for protection

HARROLD, Texas -- There's at least one school that welcome firearms to class.

It believes nothing makes a school safer than teachers who are armed,

The Harrold Independent School District is one building with 103 students. It's 20 minutes away from the nearest sheriff's station. Superintendent David Thweatt created what he calls a "guardian plan" after the attack at Virginia Tech.

"These people that go in and do these horrible acts, they're evil. But they're not that crazy -- they always know where they are going to get resistance," Thweatt said.

NRA promises "meaningful contributions" to avert another Newtown
The Newtown shootings, as they happened
Complete Coverage: Elementary School Rampage

Teachers and administrators here carry concealed handguns. They won't say how many faculty members are armed. They get extra training, but the district would not give us details.

Some people are horrified when he starts talking about putting guns in schools with children, but Thweatt said it's important to be safe.

"Sure, but it's a pretty horrific thing that happened the other day." Thweatt said. "And quite a few people are not horrified. Quite a few people we have in our district, since we have a high-transfer district, people bring their students to us for that protection."

Texas law allows concealed weapons in schools with a district's permission. Harrold was the first district to do it. A similar proposal was vetoed by Michigan's governor Tuesday.

Thweatt says allowing the firearms into the school will dissuade anyone who wants to hurt the kids.

"That's the bottom line," he said.

Since the shootings in Connecticut, Superintendent Thweatt has gotten calls from districts around the state and as far away as Missouri from school administrators asking whether they might be able to implement similar plans.

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Can Cops Read Shooter's Sabotaged Computer?

Sandy Hook Elementary School shooter Adam Lanza may have tried to sabotage his own computer before going on a murderous rampage that claimed the lives of 20 children, but experienced investigators said today that law enforcement forensic experts could still recover critical evidence from the damaged drives.

Connecticut State Police Lt. Paul Vance revealed Monday that a computer crimes unit was working in conjunction with a forensics laboratory to "dissect" any evidence relevant to the case, but he declined to comment further on what type of evidence was involved and in what condition it was in. Later that day, law enforcement officials told ABC News that police recovered a badly damaged computer from Lanza's home that appeared to have been attacked by a hammer or screwdriver.

Sources said if they can still read the computer's hard drive, they hope to find critical clues that may help explain Lanza's motives in the killing.

Former FBI forensic experts told ABC News that in cases similar to this one, damage to the computer does not necessarily mean the computer files cannot be accessed.

"If he took a hammer to the outside, smashed the screen, dented the box, it's more than likely the hard drive is still intact," said Al Johnson, a retired FBI special agent who now works privately examining digital evidence and computer data. "And even if the hard drive itself is damaged, there are still steps that can be taken to recover everything."

Gun Control Debate Resurfaces After Sandy Hook Shooting Watch Video

Sandy Hook Elementary School Shooting: Victims Laid to Rest Watch Video

Sandy Hook Elementary Shooter: What Caused Shooting? Watch Video

Brett Harrison, a former FBI computer forensics expert who now works with a D.C. consulting firm, said that authorities have a great deal of technology at their disposal to retrieve that data. How much is recovered, he said, will depend entirely on how much damage was done to the well-insulated "platters" -- discs lodged deep inside the machine -- where Lanza's every digital footstep was recorded.

It is likely, he said, that Lanza's computer has been moved to a "clean room" where, if the discs are intact, they could be removed and then carefully re-inserted in a fresh hard drive. If the calibrations are done correctly, investigators would still be able to unlock the clues on the discs.

If the discs aren't in perfect condition, Harrison said, "There is equipment they can use to read the data off a record even if a portion of it is damaged."

Johnson said it is tedious work done in a clean environment because the tolerances of the discs is so precise – even a particle of dust could destroy crucial evidence.

"We're talking about a tolerance of less than a human hair," said Johnson, who now does computer forensics for a South Carolina-based investigative firm.

Police have not said exactly what they expect to find on the computer's hard drive, but the former FBI experts said typically there could be record of visits to violent web sites, or to online stores that sell ammunition, or to email that might reveal if Lanza shared any hints of his plans with others.

"I'm not big on speculation," Harrison said, "but you're talking about potentially finding all the normal things that people do with their computer – Facebook pages, internet activity, email, you name it."

For now, the FBI is keeping mum on what kind of computer forensic help it could be offering in the case.

"At this time, in deference to the ongoing investigation being conducted by the CSP, the FBI is not releasing information regarding operational or forensic assistance provided in the Sandy Hook Elementary School shooting," an FBI spokesperson said.

Click Here for the Blotter Homepage.

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