Staff Sgt. Calvin Jackson, 60th Security Forces Squadron, participates in the new Air Force combatives course Nov. 20, 2013, at Travis Air Force Base, Calif. As part of a new Air Force combatives course, Airmen from Travis’ security forces squadrons learned defensive fighting techniques involving weapons control and keeping the opposition at a disadvantage when engaged in close quarters combat. (U.S. Air Force photo/Senior Airman Charles V. Rivezzo)