Attack on the World Trade Center

394261 77: Smoke spews from a tower of the World Trade Center September 11, 2001 after two hijacked airplanes hit the twin towers in an alleged terrorist attack on New York City. (Photo by Mario Tama/Getty Images)

World Trade Center Collapse

394261 79: Firefighters watch as smoke rises from the site of the World Trade Center collapse September 11, 2001 in New York City after two hijacked airplanes crashed into the twin towers in a terrorist attack. (Photo by Mario Tama/Getty Images)

World Trade Center Hit in Terrorist Attack

394263 22: (PUERTO RICO AND GERMANY OUT) A man leaps to his death from a fire and smoke filled Tower One of the World Trade Center September 11, 2001 in New York City after terrorists crashed two hijacked passenger planes into the twin towers. (Photo by Jose Jimenez/Primera Hora/Getty Images)

Attack On World Trade Center

394273 08: An ambulance rushes toward the World Trade Center area after the twin towers collapsed after being struck by a commerical airliner in a suspected terrorist attack September 11, 2001 in New York City. (Photo by Ezra Shaw/Getty Images)

World Trade Center Attacked by Airplane

394261 30: NEWSWEEK, US NEWS, GERMANY OUT Spectators look up as the World Trade Center goes up in flames September 11, 2001 in New York City after two airplanes slammed into the twin towers in an alleged terrorist attack. (Photo by Spencer Platt/Getty Images)

World Trade Center Attacked by Airplane

394261 18: (NEWSWEEK, US NEWS, GERMANY OUT) People rush away from the collapsing World Trade Center September 11, 2001 after two hijacked airplanes ran into the two towers in New York City in an apparent terrorist attack. (Photo by Spencer Platt/Getty Images)

World Trade Center Attacked by Airplane

394261 20: (NEWSWEEK, US NEWS, GERMANY OUT) The South tower of the World Trade Center collapses in a cloud of dust September 11, 2001 after a hijacked airplane slammed into the structure in an alleged terrorist attack. (Photo by Spencer Platt/Getty Images)

World Trade Center Attacked by Airplane

394261 21: NEWSWEEK, US NEWS, GERMANY OUT Dust swirls around south Manhattan moments after a tower of the World Trade Center collapsed September 11, 2001 in New York City after two airplanes slammed into the twin towers in an alleged terrorist attack. (Photo by Spencer Platt/Getty Images)

World Trade Center Attacked by Airplane

394261 22: ( NEWSWEEK, US NEWS, GERMANY OUT) Civilians flee the area as a tower of the World Trade Center collapses September 11, 2001 in New York City after two airplanes slammed into the twin towers in an alleged terrorist attack. (Photo by Spencer Platt/Getty Images)

World Trade Center Attacked by Airplane

394261 34: (NEWSWEEK, US NEWS, GERMANY OUT) A woman collapses in grief at the site of the fire and collapse of the World Trade Center September 11, 2001 in New York City after two airplanes slammed into the twin towers in an alleged terrorist attack. (Photo by Spencer Platt/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)

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 113: A firefighter rests 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 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 11: Smoke pours from the World Trade Center after it was hit by two hijacjked passenger planes September 11, 2001 in New York City in an alleged terrorist attack. (Photo by Robert Giroux/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 15: 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 37: A bicyle sits covered with sediment after the World Trade Center was hit two planes September 11, 2001 in New York City. (Photo by Mario Tama/Getty Images)

World Trade Center Attack

394261 50: Civilians flee as a tower of the World Trade Center collapses September 11, 2001 after two airplanes slammed into the twin towers in an alleged terrorist attack. (Photo by Mario Tama/Getty Images)

World Trade Center Attack

394261 52: Civilians flee as a tower of the World Trade Center burns September 11, 2001 after two airplanes slammed into the twin towers in an alleged terrorist attack. (Photo by Mario Tama/Getty Images)

World Trade Center Attack

394261 55: Civilians leave the area as a tower of the World Trade Center burn September 11, 2001 after two airplanes slammed into the twin towers in an alleged terrorist attack. (Photo by Mario Tama/Getty Images)

A plane crashed into the Pentagon

394262 06: Smoke comes out from the Southwest E-ring of the Pentagon building September 11, 2001 in Arlington, Va., after a plane crashed into the building and set off a huge explosion. (Photo by Alex Wong/Getty Images)

A plane crashed into the Pentagon

394262 07: Smoke comes out from the Southwest E-ring of the Pentagon building September 11, 2001 in Arlington, Va., after a plane crashed into the building and set off a huge explosion. (Photo by Alex Wong/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 07: (PUERTO RICO OUT) People hang from windows of World Trade Center after two hijacked passenger planes hit the building September 11, 2001 in New York City in an alleged terrorist attack. (Photo by Jose Jimenez/Primera Hora/Getty Images)

Attack On World Trade Center

394273 10: 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)

Hijacked Jet Crashes into Pentagon

394276 06: The Washington Momument stands in the background as the Pentagon burns after a hijacked plane crashed into the building September 11, 2001 in Washington, DC. (Photo by Greg Whitesell/Getty Images)

New York City Rescue Effort at the World Trade Center

394277 10: New York City firefighters take a rest frm rescue operations 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)

New York City Rescue Effort at the World Trade Center

394277 11: Debris covers cars 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)

New York City Rescue Effort at the World Trade Center

394277 17: A New York City police officer talks on a phone 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)

New York City Rescue Effort at the World Trade Center

394277 18: New York City firefighters work 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)

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)

Pentagon Site Of Terrorist Attack

394320 05: Fire fighters struggle to contain a spreading fire after a highjacked commercial jetliner crashed into the Pentagon September 11, 2001 in Arlington, Virginia. The Pentagon terrorist attack followed an attack on the twin towers of the New York World Trade Center in what is being called the worst terrorist attack in history. (U.S. Air Force Photo by TSgt Jim Varhegyi via Getty Images)

Memorial at U.S. Embassy In Berlin

394333 04: A German policewoman carries flowers to a memorial in front of the locked down American Embassy September 12, 2001 in Berlin. The memorial was erected in front of the embassy by mourners showing support for America and to pay homage to those killed in the terrorist attacks that struck the World Trade Center in New York City and the Pentagon in Arlington, Virginia September 11, 2001. (Photo by Nina Ruecker/Getty Images)

Memorial at U.S. Embassy In Berlin

394333 05: A young man places flowers on a memorial in front of the locked down American Embassy September 12, 2001 in Berlin. The memorial was erected in front of the embassy by mourners showing support for America and to pay homage to those killed in the terrorist attacks that struck the World Trade Center in New York City and the Pentagon in Arlington, Virginia September 11, 2001. (Photo by Nina Ruecker/Getty Images)

Memorial at U.S. Embassy In Berlin

394333 05: A young man places flowers on a memorial in front of the locked down American Embassy September 12, 2001 in Berlin. The memorial was erected in front of the embassy by mourners showing support for America and to pay homage to those killed in the terrorist attacks that struck the World Trade Center in New York City and the Pentagon in Arlington, Virginia September 11, 2001. (Photo by Nina Ruecker/Getty Images)

Terrorist Victim Vigil

394347 01: People cover themselves with an American Flag on the US Capitol grounds during a candle light vigil to remember victims who lost there life in the recent terorist attacks September 12, 2001 in Washington DC. (Photo by Mark Wilson/Getty Images)

Satellite Images of Terrorist Attack Sites

394365 01: A satellite image of lower Manhattan shows smoke and ash rising from the site of the World Trade Center at 11:43 a.m. September 12, 2001 in New York City. (Photo by spaceimaging.com/Getty Images)

Hijacked Plane Slams Into Pentagon in Terror Attack

394422 02: Smoke and flames rise over the Pentagon late into the night September 11, 2001 following a suspected terrorist crash of a hijacked commercial airliner into the Pentagon in Arlington, VA. The attack came at approximately 9:40 a.m. when a plane originating from Washington D.C.''s Dulles airport, was flown into the southern side of the building. (Photo by Bob Houlihan/U.S. Navy/Getty Images)

Bush Administration Deals with Terror Attacks on U.S

394509 01: U.S. President George W. Bush speaks to Vice President Dick Cheney by phone aboard Air Force One September 11, 2001 after departing Offutt Air Force Base in Nebraska. (Photo by Eric Draper/The White House/Getty Images)

Hijacked Jet Crashes into Pentagon

394515 01: Medical personnel load a wounded Pentagon worker into an ambulance at the first medical triage area set up outside the Pentagon September 11, 2001 after a hijacked commercial airliner crashed into the southwest corner of the building in Arlington, Virginia. (Photo by Journalist 1st Class Mark D. Faram/U.S. Navy/Getty Images)

September 11 Retrospective

NEW YORk - SEPTEMBER 11, 2001: (SEPTEMBER 11 RETROSPECTIVE) A fiery blasts rocks the south tower of the World Trade Center as the hijacked United Airlines Flight 175 from Boston crashes into the building September 11, 2001 in New York City. (Photo by Spencer Platt/Getty Images)

Aftermath Of WTC Attacks

NEW YORK CITY - SEPTEMBER 11: (FILE PHOTO) (PUERTO RICO OUT) This is a view of the burning World Trade Center towers from Park Place Street and West Broadway Avenue during the deadly terrorist attack September 11, 2001. (Jose Jimenez/Primera Hora via Getty Images) ***PUERTO RICO OUT ****

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)

New York City Firefighters - WTC Retrospective

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

New York City Firefighters - WTC Retrospective

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

New York City Firefighters - WTC Retrospective

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

New York City Firefighters

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 - Aftermath - WTC Retrospective

Smoke bellows from the New York skyline early Wednesday morning, Sept. 12, 2001. Photo by Dave Hogan/Mission Pictures/Getty Images ***NORTH AMERICAN SALES ONLY

World Trade Center Attack - Aftermath - WTC Retrospective

The New York skyline and the Brooklyn Bridge in New York City, Wednesday morning, Sept. 12, 2001. Photo by Dave Hogan/Mission Pictures/Getty Images ***NORTH AMERICAN SALES ONLY

10/10 US-ATTACKS-2ND YEAR ANNIVERSARY T

10/10 US-ATTACKS-2ND YEAR ANNIVERSARY The rubble of the World Trade Center smoulders following a terrorist attack 11 September 2001 in New York. A hijacked plane crashed into and destroyed the landmark structure. The all-out war on terrorism unleashed by Washington after the attacks marked a turning point in US-Arab relations and nowhere more so than in once top ally Saudi Arabia. With 15 of the 19 suicide hijackers carrying Saudi nationality and mastermind Osama bin Laden being the scion of a leading Saudi family, the desert kingdom and world oil kingpin, suddenly found itself on the frontline of the war on terror prosecuted by US President George W. Bush. AFP PHOTO/Alex Fuchs (Photo credit should read ALEX FUCHS/AFP/Getty Images)

Rag doll

NEW YORK - SEPTEMBER 11: American worker finds a child's rag doll after the terrorist attacks on the World Trade Centre on September 11, 2001 in New York. (Photo by Dave Hogan/Getty Images)

Smoke And Flames Rise Over The Pentagon

394422 05: Smoke And Flames Rise Over The Pentagon At About 10 A.M. Est September 11, 2001 Following A Suspected Terrorist Crash Of A Hijacked Commercial Airliner Into The South Side Of The Pentagon In Arlington, Va. The Attack Came At Approximately 9:40 A.M. As The Plane, Originating From Washington D.C.'s Dulles Airport, Was Flown Into The Southern Side Of The Building. (Photo By U.S. Navy/Getty Images)

US-ATTACKS-3RD ANNIVERSARY (FILES) This

NEW YORK, UNITED STATES: US-ATTACKS-3RD ANNIVERSARY (FILES) This 11 September 2001 file photo shows a man standing amid rubble, calling out asking if anyone needs help, following the collapse of the first World Trade Center tower in New York after two hijacked planes crashed into the buildings. 11 September, 2004 marks the third anniversary of the terrorist attacks responsible for the deaths of nearly three thousand people. AFP PHOTO/FILES/Doug KANTER (Photo credit should read DOUG KANTER/AFP/Getty Images)

US-WTC-THEN AND NOW-ST PAULS CHAPEL 1 (FILES) This

NEW YORK, UNITED STATES: US-WTC-THEN AND NOW-ST PAULS CHAPEL 1 (FILES) This 11 September 2001 file photo shows a police officer (R) and others walking up Park Row from St. Paul's Chapel (background), a few blocks from the World Trade Center site, in streets covered with debris in New York City shortly after the two towers collapsed. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images)

This file photo dated 11 September 2001 shows Edwa

NEW YORK, UNITED STATES: This file photo dated 11 September 2001 shows Edward Fine covering his mouth as he walks through the debris after the collapse of one of the World Trade Center Towers in New York. Fine was on the 78th floor of 1 World Trade Center when it was hit by a hijacked plane 11 September. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images)

American Colin Roddick reflects silently at a cand

WASHINGTON, UNITED STATES: American Colin Roddick reflects silently at a candlelight vigil at the US Capitol, 12 September 2001, in Washington, DC to commemorate the victims of the 11 September 2001 terrorist attacks in New York and Washington, DC. Hundreds of people gathered with candles and national flags at the base of the Capitol to remember the tragic day. AFP PHOTO/Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

People raise candles and national flags at a candl

WASHINGTON, UNITED STATES: People raise candles and national flags at a candlelight vigil at the US Capitol, 12 September 2001, in Washington, DC to commemorate the victims of the 11 September 2001 terrorist attacks in New York and Washington, DC. Hundreds of people gathered with candles and national flags at the base of the Capitol to remember the tragic day. AFP PHOTO/Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

Rescue workers wait for their orders near the base

NEW YORK, UNITED STATES: Rescue workers wait for their orders near the base of the World Trade Center as search efforts continue 12 September, 2001 in New York. Both towers of the World Trade Center collapsed after hijacked airliners collided with them 11 September. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images)

Fireman spray water on the fires and debris of the

NEW YORK, UNITED STATES: Fireman spray water on the fires and debris of the World Trade Center twin towers collapse early 12 September 2001 in New York City. Rescue efforts at the site are underway. Both towers of the World Trade Center collapsed after hijacked airliners collided with them 11 September. AFP PHOTO/Marcos TOWNSEND (Photo credit should read MARCOS TOWNSEND/AFP/Getty Images)

An American flag flies in the foreground as one of

NEW YORK, UNITED STATES: An American flag flies in the foreground as one of the World Trade Center towers burns in the background 11 September 2001 in New York. Two hijacked airplanes crashed into the two landmark skyscrapers. AFP PHOTO/Doug KANTER (Photo credit should read DOUG KANTER/AFP/Getty Images)

Cars are covered in rubble after the collapse of o

NEW YORK, UNITED STATES: Cars are covered in rubble after the collapse of one of the World Trade Center Towers 11 September, 2001 in New York. US President George W. Bush is to call a meeting of his top national security aides to address terrorist attacks that levelled the World Trade Center and left part of the Pentagon in ruins. AFP PHOTO Doug KANTER (Photo credit should read DOUG KANTER/AFP/Getty Images)

Firefighters make their way through the rubble of

NEW YORK, UNITED STATES: Firefighters make their way through the rubble of the World Trade Center 11 September 2001 in New York after two hijacked planes flew into the landmark skyscrapers. AFP PHOTO/Doug KANTER (Photo credit should read DOUG KANTER/AFP/Getty Images)

Firefighters make their way through the rubble of

NEW YORK, UNITED STATES: Firefighters make their way through the rubble of the World Trade Center 11 September 2001 in New York after two hijacked planes flew into the landmark skyscrapers. AFP PHOTO/Doug KANTER (Photo credit should read DOUG KANTER/AFP/Getty Images)

Firefighters make their way through the rubble of

NEW YORK, UNITED STATES: Firefighters make their way through the rubble of the World Trade Center 11 September 2001 in New York after two hijacked planes flew into the landmark skyscrapers. AFP PHOTO/Doug KANTER (Photo credit should read DOUG KANTER/AFP/Getty Images)

Rescue workers survey damage to the World Trade Ce

NEW YORK, UNITED STATES: Rescue workers survey damage to the World Trade Center 11 September, 2001 in New York. Two planes controlled by hijackers crashed into the twin towers of the center destroying the buildings. At almost the same time, another hijacked plane flew into the Pentagon in Washington, DC. AFP PHOTO Doug KANTER (Photo credit should read DOUG KANTER/AFP/Getty Images)

Smoke and ash from the destroyed World Trade Cente

JERSEY CITY, UNITED STATES: Smoke and ash from the destroyed World Trade Center billows over the southern end of New York City's Manhattan as seen from Jersey City, New Jersey in the early morning, 12 September, 2001. Terrorists hijacked two commercial airliners and crashed them into each of the towers of the Trade Center. AFP Photo/Tannen Maury (Photo credit should read TANNEN MAURY/AFP/Getty Images)

Firefighters retreat from the roof of the Pentagon

WASHINGTON, UNITED STATES: Firefighters retreat from the roof of the Pentagon in Washington, DC, 11 September 2001, while fighting the blaze caused by the crash of a hijacked commercial airliner. US President George W. Bush said thousands are feared dead in the attack and earlier crashes which collapsed the twin towers of the World Trade Center in New York. AFP PHOTO/Shawn THEW (Photo credit should read SHAWN THEW/AFP/Getty Images)

Television crews prepare for their broadcasts as s

JERSEY CITY, UNITED STATES: Television crews prepare for their broadcasts as smoke and ash from the destroyed World Trade Center rises over the southern end of New York City's Manhattan as seen from Jersey City, New Jersey in the early morning, 12 September, 2001. Terrorists hijacked two commercial airliners and crashed them into each of the towers of the Trade Center. AFP PHOTO/Tannen MAURY (Photo credit should read TANNEN MAURY/AFP/Getty Images)

Smoke and ash from the destroyed World Trade Cente

JERSEY CITY, UNITED STATES: Smoke and ash from the destroyed World Trade Center rises over the southern end of New York City's Manhattan behind the Statue of Liberty as seen from Jersey City, New Jersey 12 September 2001. Terrorists hijacked two commercial airliners and crashed them into each of the towers of the Trade Center. AFP PHOTO/Tannen MAURY (Photo credit should read TANNEN MAURY/AFP/Getty Images)

WTC Smoke Seen From Newark Airport

NEWARK, UNITED STATES: Smoke continues to billow from the remains of the World Trade Center as Continental Express planes sit at the closed Newark, New Jersey Airport 12 September 2001 in the wake of the terrorist attack on the World Trade Center. One of the hijacked planes departed the Newark Airport and later crashed near Pittsburgh, Pennsylvania. AFP PHOTO/Tannen MAURY (Photo credit should read TANNEN MAURY/AFP/Getty Images)

Photographs of missing people from the 11 Septembe

NEW YORK, UNITED STATES: Photographs of missing people from the 11 September 2001 World Trade Center attack sit on a television truck outside Bellevue Hospital in New York 12 September, 2001 where family members and friends stand vigil in hopes of getting information from authorities and help from media exposure. AFP PHOTO/JOHN MOTTERN (Photo credit should read JOHN MOTTERN/AFP/Getty Images)

Pedestrians walk across the Brooklyn Bridge away f

NEW YORK, UNITED STATES: Pedestrians walk across the Brooklyn Bridge away from the burning World Trade towers before their collapse 11 September, 2001. Both towers were hit by reportedly hijacked passenger planes in a suspected terrorist attack. Both towers later collapsed. AFP PHOTO Henny Ray ABRAMS (Photo credit should read HENNY RAY ABRAMS/AFP/Getty Images)

Smoke and flames billow out of the World Trade tow

NEW YORK, UNITED STATES: Smoke and flames billow out of the World Trade towers before its collapse 11 September, 2001 in New York. AFP PHOTO Henny Ray ABRAMS (Photo credit should read HENNY RAY ABRAMS/AFP/Getty Images)

A wall of dust and smoke races through streets as

NEW YORK, UNITED STATES: A wall of dust and smoke races through streets as the top of one of World Trade Center towers collapses after two planes crashed into each building 11 September, 2001, in New York. The suspected terrorist attacks caused the collapsed of both towers. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images)

A police officer (R) and others walk in the street

NEW YORK, UNITED STATES: A police officer (R) and others walk in the streets covered in debris near the World Trade Center towers 11 September, 2001, in New York. Two planes crashed into each building and the tops of each tower collapsed. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images)

Smoke still billows from the Pentagon 11 September

WASHINGTON, UNITED STATES: Smoke still billows from the Pentagon 11 September 2001 in Washington, DC, after a hijacked airplane crashed into the facility, nerve center of the United States military. AFP PHOTO/Stephen JAFFE (Photo credit should read STEPHEN JAFFE/AFP/Getty Images)

An ambulance, covered with debris, is on fire afte

NEW YORK, UNITED STATES: An ambulance, covered with debris, is on fire after the collapse of the first World Trade Center Tower 11 September, 2001 in New York. Two hijacked passenger planes were crashed against the twin towers causing the collapsed of both buildings. AFP PHOTO Doug KANTER (Photo credit should read DOUG KANTER/AFP/Getty Images)

Emergency vehicles stand before the devastated Pen

WASHINGTON, UNITED STATES: Emergency vehicles stand before the devastated Pentagon 11 September 2001 in Washington, DC, hours after a hijacked airplane crashed into the facility, the center of the US military, in a terrorist attack. AFP PHOTO/Stephen JAFFE (Photo credit should read STEPHEN JAFFE/AFP/Getty Images)

Smoke rises from the New York skyline 11 September

NEW YORK, UNITED STATES: Smoke rises from the New York skyline 11 September 2001 after two hijacked planes crashed into the landmark World Trade Center. US military forces worldwide were on their highest state of alert after the attacks against the World Trade Center and Pentagon, Pentagon officials said. AFP PHOTO/JOHN MOTTERN (Photo credit should read JOHN MOTTERN/AFP/Getty Images)

A police scooter sits in the rubble in lower Manha

NEW YORK, UNITED STATES: A police scooter sits in the rubble in lower Manhattan 11 September, 2001, in New York after two planes flew into the World Trade Center twin towers. Both buildings collapsed after the terrorist attack. Pieces of one of the towers can be seen on the left. AFP PHOTO Doug KANTER (Photo credit should read DOUG KANTER/AFP/Getty Images)

Smoke billows up after the first of the

Smoke billows up after the first of the two towers of the World Trade Center collapses 11 September, 2001. Two planes were crashed into the twin towers of the center. Both towers have collapsed. Another plane was crashed into the Pentagon in Washington, DC. All are suspected terrorist attacks. AFP PHOTO Henny Ray ABRAMS (Photo credit should read HENNY RAY ABRAMS/AFP/Getty Images)

An arrival board at the Los Angeles Airp

An arrival board at the Los Angeles Airport 11 September 2001 displays canceled flights around the nation following an alleged coordinated terrorist attack on the World Trade Center in New York and the Pentagon in Washington, DC. US civilian airline flights will be grounded until at least noon 12 September 2001 following the attacks on the landmark buildings. AFP PHOTO/Gerard Buckhart (Photo credit should read GERARD BURKHART/AFP/Getty Images)

TO GO WITH AFP STORIES "US-ATTACKS-5YEAR

TO GO WITH AFP STORIES "US-ATTACKS-5YEARS"
(FILES) Photo dated 11 September 2001 shows smoke billowing out of the burning World Trade Center towers while a sightseeing boat goes by on the East River in New York. The fifth anniversary of September 11 finds the United States bloodied by foreign war, polarized politically and coping with terrorism's curbs on freedom which helped define American life. AFP PHOTO/FILES/Henny Ray ABRAMS **MORE PICTURES AVAILABLE ON WWW.IMAGEFORUM2.AFP.COM** (Photo credit should read HENNY RAY ABRAMS/AFP/Getty Images)

TO GO WITH AFP STORIES "US-ATTACKS-5YEAR

TO GO WITH AFP STORIES "US-ATTACKS-5YEARS"
(FILES) This 11 September 2001 file photo shows a police officer (R) and others walking up Park Row from St. Paul's Chapel (background), a few blocks from the World Trade Center site, in streets covered with debris in New York City shortly after the two towers collapsed. The fifth anniversary of September 11 finds the United States bloodied by foreign war, polarized politically and coping with terrorism's curbs on freedom which helped define American life. AFP PHOTO/FILES/Stan HONDA **MORE PICTURES AVAILABLE ON WWW.IMAGEFORUM2.AFP.COM** (Photo credit should read STAN HONDA/AFP/Getty Images)

American flags fly as smoke rises from t

American flags fly as smoke rises from the Pentagon after an airplane flew into it in Washington, DC 11 September, 2001. Two more airplanes crashed into the World Trade Center twin towers in New York earlier today in a further string of terrorist attacks in the US. AFP PHOTO/JOSHUA ROBERTS (Photo credit should read JOSHUA ROBERTS/AFP/Getty Images)

Sam Wattle of Honolulu sells a newspaper

Sam Wattle of Honolulu sells a newspaper extra with a banner headline that reads "U.S. Under Attack" after terrorist attacks destroyed the World Trade Center twin towers and damaged the Pentagon 11 September, 2001. AFP PHOTO Mike NELSON (Photo credit should read MIKE NELSON/AFP/Getty Images)

TO GO WITH AFP STORIES "US-ATTACKS-5YEAR

TO GO WITH AFP STORIES "US-ATTACKS-5YEARS"
(FILES) This 11 September 2001 file photo shows a police officer (R) and others walking up Park Row from St. Paul's Chapel (background), a few blocks from the World Trade Center site, in streets covered with debris in New York City shortly after the two towers collapsed. The fifth anniversary of September 11 finds the United States bloodied by foreign war, polarized politically and coping with terrorism's curbs on freedom which helped define American life. AFP PHOTO/FILES/Stan HONDA **MORE PICTURES AVAILABLE ON WWW.IMAGEFORUM2.AFP.COM** (Photo credit should read STAN HONDA/AFP/Getty Images)

A hijacked commercial plane crashes into

A hijacked commercial plane crashes into the World Trade Center 11 September 2001 in New York. The landmark skyscrapers were destroyed in the attack. The all-out war on terrorism unleashed by Washington after the attacks marked a turning point in US-Arab relations and nowhere more so than in once top ally Saudi Arabia. With 15 of the 19 suicide hijackers carrying Saudi nationality and mastermind Osama bin Laden being the scion of a leading Saudi family, the desert kingdom and world oil kingpin, suddenly found itself on the frontline of the war on terror prosecuted by US President George W. Bush. AFP PHOTO SETH MCALLISTER (Photo credit should read SETH MCALLISTER/AFP/Getty Images)

Attack on the World Trade Center

(Photo by Mario Tama/Getty Images)