U.S. Air Force Airman Christopher Dranka, 633rd Security Forces Squadron installation entry controller, monitors the area while marching during a field training exercise at Marine Corps Base Quantico, Virginia, July 30, 2019. The 633rd SFS members, known as defenders, sharpened their skills while conducting day and night reconnaissance operations, establishing a forward operating base, and clearing villages to acquire a specific target. (U.S. Air Force photo by Airman 1st Class Marcus M. Bullock)