Col. Gary F. Keim (right), the commanding officer of Combat Logistics Regiment 27, 2nd Marine Logistics Group, speaks to sailors at the regimental aid station during a traditional cake cutting ceremony for the 115th hospital corpsmen birthday aboard Camp Lejeune, N.C., June 17, 2013. Hospital corpsmen serve as clinical or specialty technicians, medical administrative personnel and health care providers at medical treatment facilities. They also serve as battlefield corpsmen with the Marine Corps, rendering emergency medical treatment in a combat environment.