caption: <PERSON> <PERSON>, 455th <PERSON> Civil Engineer Squadron structural journeyman, applies joint compound which helps seal joints between drywall, Bagram Airfield, Afghanistan, Sept. 20, 2016. Structural specialists have a varied skill set that is used along with specialized materials, and equipment to build numerous structures that range from locker rooms to improvised emergency disaster relief shelters. (U.S. Air Force photo by Senior Airman <PERSON>)
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