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 file
photo. This year's anniversary of the September 11 attacks in New York
and Washington will echo the first one, with silence for the moments
the planes struck and when the buildings fell, and the reading of 2,792
victims' names. REUTERS/Larry Downing-Files

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