|

Smoke and debris fill the air after one of the World Trade Center towers
in New York City collapsed September 11, 2001. Both towers were hit by
airplanes and both buildings eventually collapsed. (Shannon
Stapleton/Reuters)
|

Smoke billows from the two World Trade Center towers after TWO planes
crashed into each tower, in New York on September 11, 2001. (Peter
Morgan/Reuters)
|
|

A fireball erupts from Tower 2 (rear, obscured by Tower 1) of the World
Trade Center in New York after a hijacked airliner crashed into it,
September 11, 2001. The aircraft crashed into Tower 2 minutes after Tower
1, already burning, was hit by another hijacked airliner. (courtesy NBC
via Reuters)
|

Debris covers firetrucks and emergency vehicles near the World Trade
Center in New York, Tuesday, Sept. 11, 2001. A terrorist attack collapsed
the 110-story buildings spreading wreckage over lower Manhattan. (AP
Photo/Boudicon One)
|
|

Firefighters comb the remains of the World Trade Center after a terrorist
attack September 11, 2001. Two hijacked commercial planes slammed into the
twin towers of the World Trade Center Tuesday, causing both 110-story
landmarks to collapse in thunderous clouds of fire and smoke and killing a
"tremendous number" of people.REUTERS/Peter Morgan
|

A plane approaches New York's World Trade Center moments before it struck
the tower at left, as seen from downtown Brooklyn, Tuesday, Sept. 11,
2001. In an unprecedented show of terrorist horror, the 110 story towers
collapsed in a shower of rubble and dust after 2 hijacked airliners
carrying scores of passangers slammed into them (AP Photo/ William Kratzke)
|
|

A sign on the New York State Thruway Tuesday, Sept. 11, 2001 in Buffalo,
N.Y., warns motorists that New York City is closed to all traffic after
terrorist attacks on the World Trade Center. (AP Photo/David Duprey)
|

This combo shows the New York skyline with the Statue of Liberty in the
foreground. The top image is taken shortly after two airliners crashed and
brought down the two towers of the World Trade Center Tuesday, Sept. 11,
2001. The bottom image shows the World Trade Center towers June 18, 1974,
just over a year after they were dedicated. (AP Photo)
|
|

Smoke billows from the top of One World Trade Center and flames and debris
explode from Two World Trade Center, Tuesday, Sept. 11, 2001, in New York.
In one of the most horrifying attacks ever against the United States,
terrorists crashed two airliners into the World Trade Center in a deadly
series of blows that brought down the twin 110-story towers. (AP
Photo/Kelley Sane)
|

The south tower of the World Trade Center, left, begins to collapse after
a terrorist attack on the landmark buildings in New York, Tuesday, Sept.
11, 2001. (AP Photo/Gulnara Samiolava)
|