Staff Sgt. Melissa Butterfield, an 817th Expeditionary Airlift Squadron loadmaster, monitors C-17 Globemaster III aircraft engines during startup Aug. 18, 2011, at Kandahar Air Field, Afghanistan, during a mission to transport equipment and supplies from Incirlik Air Base, Turkey. Loadmasters ensure the cargo is properly secured in addition to observing engines before takeoff. (U.S. Air Force photo by Tech. Sgt. Michael B. Keller/Released)
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