AUTOGRAPH COLLECTION U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs, observers soldiers as they share the autographs they received from stars on the USO holiday tour during the annual visit on Camp Leatherneck, Dec. 9, 2013. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 725597-L-TOD07-444.jpg Photo Gallery