Col. Michael Valle, former 601st Air Operations Center commander, passes the ceremonial flag to Lt. Gen. Marc Sasseville, Continental U.S. North American Aerospace Defense Command Region - First Air Force (Air Forces Northern) commander, during the 601st AOC change of command ceremony at Tyndall Air Force Base, Florida on Sept. 26, 2019. The passing of the flag symbolizes Valle's passing of command to Col. Greg Krane, the new commander of the 601st AOC. (U.S. Air Force photo by Senior Airman Cheyenne Larkin)