Col. Mark Jablow (right), outgoing Air Force Nuclear Command, Control and Communications Center commander, passes the guidon to Gen. Timothy Ray, Air Force Global Strike Command commander, during a change of command ceremony at Barksdale Air Force Base, Louisiana, July 30, 2019. Jablow has been the commander of the Air Force NC3 Center since February 2017. (U.S. Air Force photo by Senior Airman Stuart Bright)