Petty Officer 3rd Class Ray Steward, hospital corpsman with 4th Medical Battalion, 4th Marine Logistics Group, Marine Forces Reserve, provides security for the Shock Trauma Platoon while a mock ambush occurred during Exercise Global Medic at Fort McCoy, Wisconsin, Aug. 17, 2016. Providing security was essential to accomplishing the mission as it ensured that the medical staff could safely administer health care to the patients. (U.S. Marine Corps photo by Lance Cpl. Melissa Martens/Released)