Tech. Sgt. Gregory Stucky (left), 62nd Aerial Port Squadron Port Dawg University NCO in charge, watches Staff Sgt. Nicholas Gustin (center), 86th Aerial Port Squadron air transportation specialist, marshal the driver of Halverson Loader during a PDU course March 13, 2014, at Joint Base Lewis-McChord, Wash. PDU provides an independent three day course to certify students on the Halverson Loader in addition to its 90-day course for new Airmen. (U. S. Air Force photo/Airman 1st Class Jacob Jimenez)
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