MARINE CORPS BASE HAWAII, Hawaii (Dec. 2, 2020) U.S. Marines with Fox Company, 2nd Battalion, 3rd Marine Regiment learn how to breathe using a regulator during helicopter underwater egress training at Marine Corps Base Hawaii, Dec. 2, 2020. The training provides Marines with confidence to safely and efficiently exit a submerged aircraft in the event of a water landing. (U.S. Marine Corps photo by Lance Cpl. Samantha Sanchez)