AIR FORCE TRANSITION From left to right, Defense Secretary Leon E. Panetta; Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff; Air Force Secretary Michael B. Donley; Air Force Chief of Staff Gen. Norton A. Schwartz; Air Force Gen. Mark A. Welsh III; and James A. Roy, chief master sergeant of the Air Force, arrive at the transition ceremonies, where Welsh succeeded Schwartz as the 20th chief of staff on Joint Base Andrews, Md., Aug. 10, 2012. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 627649-Z-TOC42-560.jpg Photo Gallery