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The second tower of the World Trade Center bursts into flames
The second tower of the World Trade Center bursts into flames after being hit by a hijacked airplane in New York in this September 11, 2001 file photograph. Al Qaeda leader Osama bin Laden was killed in a firefight with U.S. forces in Pakistan on May 1, 2011, ending a nearly 10-year worldwide hunt for the mastermind of the Sept. 11 attacks. The Brooklyn bridge is seen in the foreground.
Credit: Reuters
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Towers of New York's World Trade Center pour smoke
A September 11, 2001 file photo shows the towers of New York's World Trade Center pour smoke shortly after being struck by hijacked commercial aircraft. New York City plans to mark the third anniversary of the attacks on the trade center with an observance at the site on September 11 with parents and grandparents of victims reading their names.
Credit: Reuters
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A rescue helicopter surveys damage to the Pentagon as firefighters battle flames
A rescue helicopter surveys damage to the Pentagon as firefighters battle flames after a hijacked airplane crashed into the U.S. military headquarters outside of Washington, in this September 11, 2001.
Credit: Reuters
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Tower of New York's World Trade Center
The remaining tower of New York's World Trade Center, Tower 2, dissolves in a cloud of dust and debris about a half hour after the first twin tower collapsed September 11, 2001. Each of the towers were hit by hijacked airliners in one of numerous acts of terrorism directed at the United States September 11, 2001.
Credit: Reuters
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Rescue workers carry mortally injured during the attack
A September 11, 2001 file photo of rescue workers carry mortally injured New York City Fire Department chaplain.
Credit: Reuters
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Pedestrians and police run as a tower of the World Trade Center collapses
Pedestrians and police run as a tower of the World Trade Center collapses, after two planes crashed into the complex destroying New York's mighty twin towers September 11, 2001.
Credit: Reuters
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World Trade Center in New York City burns
The World Trade Center in New York City burns early, September 11, 2001.
Credit: Reuters
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An American flag flies near the base of the destroyed World Trade Center
An American flag flies near the base of the destroyed World Trade Center in New York, in this file photo from September 11, 2001.
Credit: Reuters
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A lone police officer sits away from where family members of the victims
A lone police officer sits away from where family members of the victims of the September 11 attacks on the World Trade Center were gathering at the base of the "Ground Zero," September 11, 2002.
Credit: Reuters
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People look out of the burning North tower of the World Trade Center in New York City
People look out of the burning North tower of the World Trade Center in New York City September 11, 2001. Both towers were hit by planes crashing into the buildings. Shortly after this photo was taken this tower fell. In the worst attack on American soil since Pearl Harbor, three hijacked planes slammed into the Pentagon and New York's landmark World Trade Center on Tuesday, demolishing the two 110-story towers that symbolize U.S. financial might.
Credit: Reuters