Staff Sgt. Juan Lopez Carrillo, 633rd Security Forces Squadron, Base Defense Operations Center operator detains a suspect during Combat Readiness Training at Langley Air Force Base, Va., June 28, 2016. Expeditionary entry control point operations is just one of eight blocks of instruction taught at CRT, acting as a refresher/prerequisite for predeployment training. (U.S. Air Force photo by/Tech. Sgt. Daylena S. Ricks)