The entrance to the U.S. Marine Corps Base Quantico Friday March 22, 2013. Three people, including the suspect, were killed in a shooting at Marine Base Quantico, base spokesman Lt. Agustin Solivan said early Friday. Solivan said they believe the suspect, whose name wasn't released, is a staff member at the officer candidate school at the base. No information on the victim was immediately released. (AP Photo/Matthew Barakat) less