A U.S. Army color guard stands at attention during a change of command ceremony in Hangar 3 Aug. 16, 2012. During the ceremony, Col. William D. McGarrity took command of the U.S. Army Air Operations Group. The U.S. Army Air Operations Group is headquartered at Fort McNair in Washington, D.C. (U.S. Air Force photo/Senior Airman Lindsey A. Porter)