Gen. Mark A. Welsh III addresses an audience after being sworn in as the 20th Air Force chief of staff during a ceremony at Joint Base Andrews, Md., Aug. 10, 2012. The unique ceremonial uniforms worn by the CSAF and the chief master sergeant of the Air Force during today's transition ceremony are authorized for wear only by these senior leaders when they attend events of a ceremonial nature. They are not intended for wear by any other individuals, groups, or the entire Air Force. (U.S. Air Force photo by Senior Airman Christina Brownlow) (KJT)