F. E. WARREN AIR FORCE BASE, Wyo. -- Colonel John Grimm took command of the 90th Security Forces Group during a change-of-command ceremony here June 9, 2017.
Colonel Christopher Corley, outgoing commander, will continue his Air Force career at Ramstein Air Base, Germany.
A change-of-command ceremony is a tradition that represents a formal transfer of authority and responsibility from the outgoing commander to the incoming commander.