Col. Michael Valle, 101st Air and Space Operations Group commander, takes the ceremonial flag from Lt. Gen. R. Scott Williams, Continental U.S. NORAD Region – First Air Force (Air Forces Northern) commander, during the 601st Air Operations Center change of command ceremony at Tyndall Air Force Base, Florida on April 13, 2018. The passing of the flag symbolizes Valle’s acceptance of command of the 601st AOC. (U.S. Air Force photo by Airman 1st Class Delaney Gonzales/Released)