Sgt. Anthony Poznanski, a drill instructor with Company M, 3rd Recruit Battalion, Recruit Training Regiment, Marine Corps Recruit Depot San Diego, pulls Navy Petty Officer 3rd Class Cory M. Brandon, a corpsman with Naval Hospital Camp Pendleton during full-gear rescue swims aboard Marine Corps Air Station Miramar, March 11. The Marines and sailors spent three weeks training to become Marine Combat Instructors of Water Survival. (U.S. Marine Corps photo by Lance Cpl. Christopher O'Quin) (Released) - Sgt. Anthony Poznanski, a drill instructor with Company M, 3rd Recruit Battalion, Recruit Training Regiment, Marine Corps Recruit Depot San Diego, pulls Navy Petty Officer 3rd Class Cory M. Brandon, a corpsman with Naval Hospital Camp Pendleton during full-gear rescue swims aboard Marine Corps Air Station Miramar, March 11. The Marines and sailors spent three weeks training to become Marine Combat Instructors of Water Survival. (U.S. Marine Corps photo by Lance Cpl. Christopher O'Quin) (Released)