21st SFS
Master Sgt. Frank Green, 21st Security Forces Squadron, leads squadron physical fitness training June 14 on Peterson Air Force Base. The 21st SFS switched from 12-hour shifts to eight-hour shifts in April. The move is part of the new integrated defense plan, which changes how the squadron polices the base and how it uses its resources. The new eight-hour shifts allowed the squadron to have unit PT once again. (U.S. Air Force photo/Monica Mendoza)