U.S. Defense Secretary Leon Panetta (R) lays a wreath at the Flight 93 National Memorial ahead of the 11th anniversary of the 9/11 attacks in Shanksville, Pennsylvania, September 10, 2012. The Flight 93 National Memorial was built in honor of the passengers and crew of United Airlines Flight 93, whose actions on September 11, 2001 led to the hijacked plane being crashed in a field near Shanksvile before it reached the U.S. Capitol in Washington, believed to be its intended target. REUTERS/Mandel Ngan/Pool (UNITED STATES - Tags: POLITICS MILITARY CIVIL UNREST ANNIVERSARY)