U.S. Marine Corps Gen. James F. Amos, right, the commandant of the Marine Corps, signs a Marine Corps flag at Camp Leatherneck, Helmand province, Afghanistan, Dec. 25, 2012. The flag was sent to Sandy Hook Elementary School in Newtown, Conn., where 20 children and six adults were killed in a mass shooting Dec. 14, 2012. (U.S. Marine Corps photo by Sgt. Mallory S. VanderSchans/Released)