21st SFS recieves new commander
PETERSON AIR FORCE BASE, Colo. – Col. Kirsten Aguilar (left), 21st Mission Support Group commander, presents the guidon to Lt. Col. Drew Gehler (right), 21st Security Forces Squadron commander, during a change of command ceremony, June 21, 2019 at Peterson Air Force Base, Colorado. The passing of the guidon represents a formal transfer of authority and responsibility from an outgoing commander to an incoming one. This ensures that the unit and its Airmen are never without leadership. (U.S. Air Force photo by Craig Denton)