2/20/2013 - Staff Sgt. James Kirk, 51st Security Forces Squadron combat arms instructor, marks a target to assist a student in zeroing his weapon during the new qualification course at the combat arms range at Osan Air Base, Republic of Korea, Jan. 31, 2013. A combat arms instructor is a unique duty within security forces. They are trained to teach Airmen to be combat ready to fire a weapon safely when necessary. Through all qualification courses, the CATM range alone goes through more than 250,000 rounds annually. (U.S. Air Force photo/Airman 1st Class Alexis Siekert)

2/20/2013 - Office of Special Investigations agents prepare to fire during a new and improved qualification course at the combat arms range at Osan Air Base, Republic of Korea, Jan. 31, 2013. The agents participated in the new course which combines multiple target drills, target discrimination and burst fire. The new course was enacted in 2012. (U.S. Air Force photo/Airman 1st Class Alexis Siekert)

2/20/2013 - Staff Sgt. Matthew Marquart, 51st Security Forces Squadron combat arms instructor, marks a target to assist a student in zeroing his weapon during a new and improved qualification course at the combat arms range at Osan Air Base, Republic of Korea, Jan. 31, 2013. CATM cadres teach anywhere from 50-100 Airmen a week during the course which covers weapon safety, maintenance and operation. The instructor team is made up of only six Airmen. (U.S. Air Force photo/Airman 1st Class Alexis Siekert)

2/20/2013 - An Office of Special Investigations agent takes aim during a new and improved qualification course at the combat arms range at Osan Air Base, Republic of Korea, Jan. 31, 2013. Combat arms instructors help qualify hundreds of Airmen a month on the range. The instructors qualify a minimum of 80 security forces Airmen per month as well as keep the rest of the base populous combat ready. (U.S. Air Force photo/Airman 1st Class Alexis Siekert)

2/20/2013 - Staff Sgt. Matthew Marquart, 51st Security Forces Squadron combat arms instructor, marks a target to assist a student in zeroing his weapon during a new and improved qualification course at the combat arms range at Osan Air Base, Republic of Korea, Jan. 31, 2013. CATM cadres teach anywhere from 50-100 Airmen a week during the course which covers weapon safety, maintenance and operation. In addition to standard security forces training, CATM instructors must go through a three-month course to become certifiable. (U.S. Air Force photo/Airman 1st Class Alexis Siekert)