Newly commissioned second lieutenants of Bravo Co., at The Basic School, float to conserve energy during the four-minute water tread portion of Marine Corps Water Survival Training Program qualification at Ramer Hall Swim Tank, Marine Corps Base Quantico, Va., Jan. 17, 2013. After completing Officer Candidate School and earning their commission, new officers attend TBS to hone their skills as leaders and warriors. The MCWST program is just one of the many challenges they face before being assigned as future leaders of the Corps.