U.S. Air Force Master Sgt. Thomas Donahue, 18th Security Forces Squadron superintendent, establishes a security perimeter during a small unit tactics exercise Aug. 21, 2019, at the Jungle Warfare Training Center, Camp Gonsalves, Japan. Donahue participated in a multi-day field training event hosted by the U.S. Army Green Berets from 1st Battalion, 1st Special Forces Group (Airborne), who specialize in the full spectrum of special operations in the Indo-Pacific. (U.S. Air Force photo by Staff Sgt. Peter Reft)