230113-F-IA158-1006
U.S. Air Force Staff Sgt. William Au, 6th Security Forces Squadron emergency services team defender, briefs his team on the upcoming exercise at MacDill Air Force Base, Florida, Jan. 13, 2023. EST Airmen are highly trained and equipped to mitigate special threats which can involve barricaded suspects, hostages and active shooters. (U.S. Air Force photo by Airman 1st Class Zachary Foster)