18th PMEL
Staff Sgt. Christopher Corbine calibrates an alignment collimator making sure that the bore sight of the aircraft is aligned at Kadena Air Base, Japan, Sept. 11, 2007. The precision measurement equipment laboratory performs and manages repair, calibration, and modification of test, measurement, and diagnostic equipment standards and automatic test equipment. Sergeant Corbine is assigned to the 18th Component Maintenance Squadron. (U.S. Air Force photo/Airman 1st Class Sheila deVera)