U.S. Army Spc. Richard Ratliff, 511th Engineer Dive Detachment salvage diver, holds the door shut inside a hyperbaric chamber during an exercise at Joint Base Langley-Eustis, Virginia, May 14, 2021. The detachment conducted the exercise with JBLE-Eustis Fire and Emergency Services to validate locations and ambulance exchange points for diving casualties at Third Port. (U.S. Air Force photo by Staff Sgt. Joshua Magbanua)