Deputy Defense Decretary William J. Lynn III delivers remarks at the dedication of the new USO exhibit at the Pentagon, Aug. 31, 2011. The exhibit chronicles the work of the USO in supporting the morale of American troops from its beginnings in World War II to the present day. USO President Sloan D. Gibson, Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, and the Defense Department's Director of Administration and Management Michael L. Rhodes joined Lynn. DOD photo by R.D. Ward

Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, tours memorabilia at the dedication ceremony of the USO exhibit at the Pentagon, Aug. 31, 2011. DOD photo by U.S. Navy Petty Officer 1st Class Chad J. McNeeley

Deputy Defense Secretary William J. Lynn III congratulates Army Gen. David H. Petraeus at his retirement ceremony and Armed Forces Farewell on Joint Base Meyer-Henderson Hall, Va., Aug. 31, 2011. Petraeus retired after a 37-year career to become CIA director. DOD photo by U.S. Navy Petty Officer 1st Class Chad J. McNeeley

Army Gen. David H. Petraeus, center, salutes as he stands with his family, Deputy Defense Secretary William J. Lynn III and Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, during a pass and review of troops at his Armed Forces Farewell and retirement ceremony, Joint Base Myer-Henderson Hall, Va., Aug. 31, 2011. DOD photo by U.S. Air Force Tech. Sgt. Jacob N. Bailey

Army Gen. David H. Petraeus delivers remarks at his retirement ceremony and Armed Forces Farewell on Joint Base Meyer-Henderson Hall, Va., August 31, 2011. Petraeus is retiring after a 37-year career to become CIA director. DOD photo by U.S. Navy Petty Officer 1st Class Chad J. McNeeley

Army Gen. David H. Petraeus gives the thumbs up with his wfe, Holly, at his retirement ceremony and Armed Forces Farewell on Joint Base Meyer-Henderson Hall, Va., Aug. 31, 2011. Petraeus retired after a 37-year career to become CIA director. DOD photo by U.S. Navy Petty Officer 1st Class Chad J. McNeeley

Army Gen. David H. Petraeus reviews troops at his retirement ceremony and Armed Forces Farewell on Joint Base Meyer-Henderson Hall, Va., Aug. 31, 2011. Petraeus retired from the military after a 37-year career to become CIA director. DOD photo by U.S. Navy Petty Officer 1st Class Chad J. McNeeley

U.S. Navy Cmdr. Laurie Hale examines an infant at a temporary medical site at the Killick Coast Guard Base during Continuing Promise 2011 in Port-Au-Prince, Haiti, Aug. 28, 2011. Continuing Promise is a five-month humanitarian assistance mission to the Caribbean, Central and South America. U.S. Navy photo by Petty Officer 2nd Class Eric C. Tretter