Archive copy of ABC News at the end of the gruesome day

New York's World Trade Center collapsed Tuesday after being struck by two hijacked airplanes. Another airliner was forced to crash into the Pentagon and a fourth plane crashed outside Pittsburgh.
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A scene of utter terror ensued after planes smashed into the World Trade Center towers.
Moment of Collapse

President Bush assured the world America would withstand the worst terrorist attacks the nation has ever suffered.

It's far from clear who conceieved or conducted the terror attacks against U.S. targets, but analysts say the signs point to one man's organization.

Airline executives and government officials discuss changes to airport rules in the wake of the terrorist attacks.

Emergency crews stretched to the limit in nation's biggest city.

Unclear if disaster is linked to terror attacks.

Victims describe the horror in their own words.