U.S. Air Force Col. Thomas Wark, 192nd Fighter Wing commander, delivers his first official remarks as commander during a change of command ceremony at Langley Air Force Base, Va., March 4, 2012. Wark assumed command from Col. Bryan Turner. As commander, Wark intends to optimize the use of the wing through the execution of its three core missions: the F-22; Intelligence, Surveillance and Reconnaissance; and Supply Chain Management. (U.S. Air Force photo by Airman 1st Class Teresa Cleveland/Released)