Visitors to the Flight 93 National Memorial in Shanksville, Pa., participate in a sunset memorial service on Monday, Sept. 10, 2012. Tuesday marks the 11th anniversary of the Sept. 11, 2001 terrorist ... more 
Visitors to the Flight 93 National Memorial in Shanksville, Pa., participate in a sunset memorial service on Monday, Sept. 10, 2012. Tuesday marks the 11th anniversary of the Sept. 11, 2001 terrorist attacks. (AP Photo/Gene J. Puskar) less 
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Associated Press | Photo By Gene J. Puskar
Tue, Sep 11, 2012 11:51 AM EDT