U.S. Army Spc. Michael Singley, a second class diver assigned to the 569th Engineer Dive Detachment, secures a surface supply dive helmet onto another diver at Fort Eustis, Va., March 22, 2016. The surface supply helmet allows for divers to submerge with continuous oxygen and communication supplied by surface lines rather than an underwater tank. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)