Port Royal, South Carolina - Corporals Michael Button (left) and Craig Ledyard (right), both motor transportation operators with Marine Wing Support Squadron 273, explain the functions and purpose of the High Mobility Multipurpose Wheeled Vehicle (HMMWV), also referred to as Humvee, to a student during a career day at Port Royal Elementary School on May 8, 2014. MWSS-273 provides all essential aviation ground support to a designated fixed-wing component of a Marine Aviation Combat Element to include internal airfield communications, weather services, expeditionary airfield services, aircraft rescue and firefighting, aircraft and ground refueling, essential engineering services, motor transport, messing, chemical defense, security and law enforcement, airbase commandant functions, and explosive ordinance disposal. (U.S. Marine Corps photo by Sgt. Marcy Sanchez)