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U.S. Air Force Senior Airman Russell Elliott, a 35th Civil Engineer Squadron aircraft arresting system journeyman, links a chain back together with a chain puller at Misawa Air Base, Japan, Sept. 14, 2017. Airmen with barrier maintenance synced two barrier kit-12 arresting systems, which are ground-based braking systems designed for tail-hook equipped aircraft, such as the F-16 Fighting Falcon, in case of an in-flight emergency.