Headstones in Arlington National Cemetery last March. The new online database should make it easier to find specific graves. Karen Bleier /AFP/Getty Images hide caption

itoggle caption Karen Bleier /AFP/Getty Images

Visitors walk among gravestones adorned with seasonal Christmas wreaths at Arlington National Cemetery. Jacquelyn Martin/AP hide caption

itoggle caption Jacquelyn Martin/AP

April 20: Soldiers from the U.S. Army 3rd Infantry Regiment, also called "The Old Guard," carry U.S. Army Corporal Justin Ross' flag-draped casket during his burial ceremony at Arlington National Cemetery. Ross, 22, of Green Bay, Wis., died March 26 in Helmand province, Afghanistan. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images