Phillip Castro, 362nd Training Squadron master instructor, explains the importance of checking the safety locking pin on the aircraft during maintenance at Sheppard Air Force Base, Texas, Dec. 1. Castro’s F-16 Falcon crew chief class is in block four of eight and is scheduled to graduate Feb. 26.

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Keywords: .., aetc, afb, air, airman, airmen, , base, command, education, falls, fight, fly, force, military, power, sheppard, texas, training, usaf, wichita, win