Secretary of Defense Donald H. Rumsfeld talks to reporters during a Pentagon press briefing in Arlington, Va., on March 28, 2006. Rumsfeld spoke of his trip to the crash site of United Flight 93 on Sept. 11, 2001, in Shanksville, Pa., in his opening remarks before taking questions from reporters with Chairman of the Joint Chiefs of Staff Gen. Peter Pace, U.S. Marine Corps.