U.S. Air Force Tech. Sgt. Jason Bouse, left, 372nd Training Squadron Detachment 23 weapons instructor, instructs Airman 1st Class Jerrion Roque, 35th Maintenance Squadron armament systems apprentice, to measure certain areas of a 14 inch hook with a dial caliper at Misawa Air Base, Japan, April 10, 2012. The hooks are used to hold bombs onto an aircraft, and if they are not calibrated correctly, it could cause damage to the aircraft. (U.S. Air Force photo/Airman 1st Class Kia Atkins/Released)