Picture 1

A ball of fire erupts from one of the towers of New York's World Trade Center as a hijacked airliner is deliberately crashed into it, September 11, 2001.

The aircraft crashed into Tower 2 as Tower 1 (R) burned after being hit minutes earlier by another hijacked airliner. Both towers collapsed to the ground a short time later.

An airliner was also crashed into the Pentagon near Washington this morning and another airliner crashed near Pittsburgh, Pennsylvania in apparently related actions.