CHAIRMAN APPLAUSE Defense Secretary Ash Carter offers applause as he thanks Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, for his friendship and service during a press conference at the Pentagon, May 7, 2015. Dempsey, who has served as chairman since 2011, will leave his post later this year. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 554650-N-YKD62-107.jpg Photo Gallery