Col. John Gallemore, former 57th Adversary Tactics Group commander receives the guidon from Brig. Gen. Robert G. Novotny, 57th Wing commander as he assumes command of the 57th Operations Group as Chief Master Sgt. Thomas Schaefer II, 57th OG superintendent looks on during a change of command ceremony at Nellis Air Force Base, Nev., March 31, 2020. The modest ceremony, adapted to support social distancing initiatives, marked the merger of the 57th Adversary Tactics Group and the 57th OG, placing both group functions under the leadership of one commander. (U.S. Air Force photo by Airman 1st Class Dwane Young)