Petty Officer 3rd Class Robert Newkirt (left) and Petty Officer 3rd Class Sebastian Quiceno (right), corpsmen with 1st Battalion, 5th Marine Regiment, check the vitals of a role-player with notional symptoms of concussion at the casualty control point during a foreign humanitarian assistance exercise at Kiwanis Park, Yuma, Arizona, as part of Weapons and Tactics Instructor Course 2-15, April 17. Role-players yelled in pain and pretended to be unconscious, providing a realistic scenario for the evaluated Sailors and Marines during the exercise. (Official Marine Corps Photo by Cpl. Charles Santamaria/Released) - Petty Officer 3rd Class Robert Newkirt (left) and Petty Officer 3rd Class Sebastian Quiceno (right), corpsmen with 1st Battalion, 5th Marine Regiment, check the vitals of a role-player with notional symptoms of concussion at the casualty control point during a foreign humanitarian assistance exercise at Kiwanis Park, Yuma, Arizona, as part of Weapons and Tactics Instructor Course 2-15, April 17. Role-players yelled in pain and pretended to be unconscious, providing a realistic scenario for the evaluated Sailors and Marines during the exercise. (Official Marine Corps Photo by Cpl. Charles Santamaria/Released)