MEMORIAL MOMENT A soldier places a small American flag into the ground in front of a headstone during “Flags In” at Arlington National Cemetery in Arlington, Va., May 21, 2015. During the annual tradition before Memorial Day, soldiers assigned to the 3rd U.S. Infantry Regiment, known as “The Old Guard,” place small American flags next to 228,000 headstones. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 907138-B-LPU29-518.jpg Photo Gallery