Marine Corps 1st Lt. Geoffrey B. Miller, a platoon commander with Bravo Company, 1st Battalion, 3rd Marine Regiment, practices using an Emergency Breathing System during Helicopter Underwater Egress Training at the base pool, aboard Marine Corps Base Hawaii, March 23, 2017. The purpose of this training is to prepare service members for an emergency exit in case of a crash landing over water. ( Marine Corps photo by Cpl. Aaron S. Patterson/released)

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Size: 4989px × 3326px
Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
Model Released: No

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