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U.S. Marine Corps Pfc. Michael Garziano, an infantryman with Detachment 4th Force Reconnaissance Company, conducts a water treading exercise while holding a rubber rifle during a pool training event, Marine Corps Base Hawaii, Jan. 22, 2018. The event consisted of various exercises, including a 25 meter underwater swim, static breath holds, a 1km swim, and gear retrievals. The unit’s training program aims to prepare students for the stresses of the BRC by offering a broad, realistic curriculum, challenging them both mentally and physically.