U.S. Army Pfc. James Lewis, 30th Engineer Battalion, 20th Eng. Brigade, 74th Eng. Dive Detachment second-class diver, waits at the surface of a dive-tank for instructions during training at Joint Base Langley-Eustis, Va., June 6, 2017. Lewis, a stand-by diver, practiced rescuing a fellow diver during the training to upgrade his team’s proficiency as a unit. (U.S. Air Force photo/Airman 1st Class Kaylee Dubois)