Tech. Sgt. Christopher Walls uses a breakaway force tester March 25 on a KC-135 Stratotanker aerial refueling drogue. He is with the 452nd Maintenance Squadron's aircraft pneudraulics systems shop at March Air Reserve Base, Calif. March ARB, located in Southern California, is home to the largest air mobility wing in the Air Force Reserve Command. (U.S. Air Force photo/Val Gempis)