THUMBS UP Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, gives a thumbs up as he talks with a Navy SH-60 Seahawk helicopter crew chief on Andersen Air Force Base, Guam, May 30, 2012. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 200682-W-SFO85-270.jpg Photo Gallery