Staff Sgt. Josh Serafin, a B-52 Stratofortress crew chief with the 5th Aircraft Maintenance Unit, pulls an audio cord while he completes a pre-flight check with the aircrew on a B-52 at Minot Air Force Base, N.D., Jan. 26, 2017. Serafin communicates directly with aircrew prior to takeoff to ensure each requirement is thoroughly checked and cleared safe for takeoff. (U.S. Air Force photo by Tech Sgt. Vernon Young Jr.)
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