ROK Ranger Qualification Course
An instructor tightens a rope to the harness of Staff Sgt. Stephen Barber, 51st Security Forces Squadron, as part of the repelling training during the Republic of Korea Ranger Qualification Course on Jinju Air Base, ROK, May 27, 2014. The group covered maneuvering while repelling, entering windows from the outside and assaulting enemy targets located in the building during the second week. (U.S. Air Force photo/Senior Airman David Owsianka)