U.S. Marine Corps Gunnery Sgt. Stephen P. Nelson, left, demonstrates the proper way to save a drowning victim with the help of Cpl. John L. Sirmon, with Class 2-12, during the Marine Corps Instructor Trainer Water Survival (MCITWS) course, Marine Corps Water Survival School (MCWSS), Marine Corps Combat Service Support Schools, at Camp Johnson, N.C., Jan. 20, 2012. The MCITWS course consists of fifteen training days to teach Marines to become Marine Corps swim instructors. Nelson is the chief instructor trainer with MCWSS.