Unforgettable images from 9/11

Published On: Sep 10 2013 01:19:57 PM CDT   Updated On: Sep 11 2014 01:00:00 AM CDT

Look back at some of the many unforgettable images from the day America was attacked on 9/11.

9-11 - Flight 93
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Tim Shaffer/Reuters

A fourth hijacked flight, United Airlines Flight 93, crashed near Shanksville, Pa., at 10:03 a.m. after passengers reportedly fought with the hijackers. Here, investigators comb what little debris was left for the flight data recorder.

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