U.S. Army Staff Sgt. Christopher Miller, 511th Engineer Dive Detachment diving supervisor, briefs the dive team before a dive supervisor qualification training scenario at Joint Base Langley-Eustis, Virginia, Aug. 22, 2018. The training qualifies 511th EDD Soldiers to become unlimited dive supervisors, allowing them to oversee dive team missions on their own. (U.S. Air Force photo y Senior Airman Tristan Biese)