(Reuters) - A U.S. Marine leans on the headstone of a comrade recently buried in Section 60 of Arlington National Cemetery near Washington, May 27, 2010. A U.S. flag was placed at the gravesites of all the servicemen and women buried in Arlington National Cemetery on Thursday, in preparation for Memorial Day this weekend. REUTERS/Jason Reed (UNITED STATES - Tags: ANNIVERSARY MILITARY IMAGES OF THE DAY)