caption: <PERSON>. <PERSON> <PERSON>, 5th Battalion, 159th Aviation Regiment, D Company platoon sergeant, inspects a Boeing CH-47 Chinook helicopter after maintenance at Fort Eustis, Va., Oct. 3, 2013. CH-47s are mainly used to transport cargo internally and externally with the use of sling loads. (U.S. Air Force photos by <PERSON>/Released)
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