PAYING RESPECTS President Barack Obama lays a wreath at the Tomb of the Unknown Soldier during the Memorial Day observance ceremony at Arlington National Cemetery in Arlington Va., May 28, 2012. Obama urged all Americans to remember those who have sacrificed for the nation and to support the surviving family members of fallen service members. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 315676-H-UCL84-274.jpg Photo Gallery