Col. Samantha Weeks assumes command of the 57th Adversary Tactics Group from Brig. General Jeanie Leavitt, 57th Wing commander, during a change of command ceremony held in the U.S. Air Force Thunderbirds hangar at Nellis Air Force Base, Nev., Aug. 5. The 57th ATG provides a coordinated Red Force to train U.S. personnel and coalition partners during exercises and deployments, while overseeing U.S. Air Force-wide air, air defense, space and information aggressor initiatives and threat academic programs.