Operations Group
U.S. Air Force Brig Gen. Donald Bacon, 55th Wing commander, gives the command guidon to Col. Russell Mammoser, incoming 55th Operations Group commander, during a formal change of command ceremony held May 24 in Dock 1 of the Bennie Davis Maintenance Facility at Offutt Air Force Base, Neb. Hundreds of Airmen, family and distinguished visitors were in attendance for the change of command. (U.S. Air Force photo by Josh Plueger)