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Attacks World Trade Center

In this Sept. 11, 2001 photo made by the New York City Police Department and provided by ABC News Tuesday Feb. 9, 2010, smoke and ash engulf lower Manhattan after terrorists flew two airliners into the World trade Center towers. (AP Photo/NYPD, via ABC News, Det. Greg Semendinger ) MANDATORY CREDIT

Attacks World Trade Center

In this Sept. 11, 2001 photo made by the New York City Police Department and provided by ABC News, Tuesday Feb. 9, 2010, smoke billows from the grounds of World Trade Center in New York after terrorists flew two airliners into the towers. (AP Photo/NYPD via ABC News, Det. Greg Semendinger) MANDATORY CREDIT

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New York City Firefighters - WTC Retrospective

Fireman heading south on the West Side Highway towards the remains of the World Trade Center where smoke continued hours after the colapse. Streets of lower Manhattan with fireman, police, and rescue crews after the colapse of the World Trade Center after being hit by two airplanes on September 11, 2001. photo by Gabe Palacio/ImageDirect

World Trade Center attack - WTC Retrospective

The World Trade Center burning after two airliners crashed into the buildings in New York City, Tuesday September 11, 2001. Photo by Gabe Palacio/ImageDirect.

World Trade Center Attacked

NEW YORK - SEPTEMBER 11: Hijacked United Airlines Flight 175 from Boston crashes into the south tower of the World Trade Center and explodes at 9:03 a.m. on September 11, 2001 in New York City. The crash of two airliners hijacked by terrorists loyal to al Qaeda leader Osama bin Laden and subsequent collapse of the twin towers killed some 2,800 people. (Photo by Spencer Platt/Getty Images)

September 11 Retrospective

NEW YORK - SEPTEMBER 11, 2001: (SEPTEMBER 11 RETROSPECTIVE) A firefighter breaks down after the World Trade Center buildings collapsed September 11, 2001 after two hijacked airplanes slammed into the twin towers in a terrorist attack. (Photo by Mario Tama/Getty Images)

Aftermath of World Trade Center Attack

394331 05: Smoke billows from where the World Trade Center twin towers stood September 11, 2001 in New York City. (Photo by Chris Hondros/Getty Images)

New York City Rescue Effort at the World Trade Center

394277 19: Debris covers the streets around at the World Trade Center after two hijacked planes crashed into the Twin Towers September 11, 2001 in New York. (Photo by Ron Agam/Getty Images)

Attack On World Trade Center

394273 03: Smoke billows from the World Trade Center's twin towers after they were struck by commerical airliners in a suspected terrorist attack September 11, 2001 in New York City. (Photo by Ezra Shaw/Getty Images)

Newspapers Report World Trade Center Bombing

394272 02: A woman reads a copy of an evening newspaper reporting the terrorist attacks on the United States on an underground train September 11, 2001 in London. (Photo by Graham Barclay/BWP Media/Getty Images)

World Trade Center Hit by Two Planes

394263 10: (PUERTO RICO OUT) The World Trade Center crumbles after two planes hit the building September 11, 2001 in New York City. (Photo by Jose Jimenez/Primera Hora/Getty Images)

World Trade Center Hit by Two Planes

394263 07: (PUERTO RICO OUT) People hang from windows of World Trade Center after two planes hit the building September 11, 2001 in New York City. (Photo by Jose Jimenez/Primera Hora/Getty Images)

World Trade Center Hit by Two Planes

394263 05: (PUERTO RICO OUT) People run away as the second tower of World Trade Center crumbles down after a plane hit the building September 11, 2001 in New York City. (Photo by Jose Jimenez/Primera Hora/Getty Images)

World Trade Center Hit by Two Planes

394263 04: (PUERTO RICO OUT) A person falls to his death from the World Trade Center after two planes hit the Twin Towers September 11, 2001 in New York City. (Photo by Jose Jimenez/Primera Hora/Getty Images)

World Trade Center Attacked

394261 14: A fiery blasts rocks the World Trade Center after being hit by two planes September 11, 2001 in New York City. (Photo by Spencer Platt/Getty Images)

World Trade Center Attacked

394261 12: A fiery blasts rocks the World Trade Center after being hit by two planes September 11, 2001 in New York City. (Photo by Spencer Platt/Getty Images)

World Trade Center Attack

394261 115: People walk in the street in the area where the World Trade Center buildings collapsed September 11, 2001 after two airplanes slammed into the twin towers in a suspected terrorist attack. (Photo by Mario Tama/Getty Images)

World Trade Center Attacked

394261 112: A fiery blasts rocks the World Trade Center after being hit by two planes September 11, 2001 in New York City. (Photo by Spencer Platt/Getty Images)

World Trade Center Attack

394261 111: People walk in the street in the area where the World Trade Center buildings collapsed September 11, 2001 after two airplanes slammed into the twin towers in a suspected terrorist attack. (Photo by Mario Tama/Getty Images)

World Trade Center Attacked

394261 109: Smoke pours from the World Trade Center after it was hit by two planes September 11, 2001 in New York City. (Photo by Robert Giroux/Getty Images)

Two Planes Crash into World Trade Center

394261 05: Smoke pours from the World Trade Center after being hit by two planes September 11, 2001 in New York City. (Photo by Fabina Sbina/ Hugh Zareasky/Getty Images)

Nodar Kumaritashvili

Track volunteers comfort each other as an ambulance carries Georgian luger Nodar Kumaritashvili to medical attention following his crash during men's luge training, Friday, Feb. 12, 2010, at the 2010 Vancouver Olympic Winter Games in Whistler, British Columbia. (AP Photo/The Canadian Pres, Jeff McIntosh)