Gauges show the current pressure inside the hyperbaric chamber during a training event involving Fort Eustis divers and local community search and rescue teams at Fort Eustis, May 2, 2013. The training was for divers and medical personnel from both local and federal search and rescue dive teams, and instructed personnel on basic dive first aid, known as "tender maneuvers." (U.S. Air Force photo by Staff Sgt. Wesley Farnsworth/Released)