Recruits recite their names and division numbers while experiencing the effects of tear gas in the USS Chief training facility at Recruit Training Command in Great Lakes, Ill., Jan. 10, 2018. The facility's experts spend several days training recruits, covering topics ranging from basic damage control equipment to advanced shipboard firefighting techniques. About 30,000 to 40,000 recruits graduate annually from the Navy’s only boot camp. Navy photo by Petty Officer 1st Class Amanda S. Kitchner