Memorial Day (20 images)

A woman cries at the grave site of a loved one in Section 60 at Arlington National Cemetery in Arlington, Virginia on May 28, 2012. UPI/Molly Riley

A man visits the grave site of a loved one in Section 60 at Arlington National Cemetery in Arlington, Virginia on May 28, 2012. UPI/Molly Riley

Secretary of Defense Leon Panetta visits the grave site of U.S. Army Sgt. Karl Campbell, with his family members Arthur and Audrey Campbell, and Karl's nephew Devin, in Section 60 at Arlington National Cemetery in Arlington, Virginia on May 28, 2012. UPI/Molly Riley

A U.S. Air Force B-52 flies over the Vietnam Veterans Memorial during commemoration of 50th anniversary of the war on May 28, 2012 in Washington, DC. President Barack Obama is at the base of the wall left center. More than 58,000 names of the servicemen who were killed or missing in the war are engraved on The Wall. The B-52 bomber was used extensively during the Vietnam War. UPI/Pat Benic