From left, first lady Michelle Obama, President Barack Obama, U.S. Paralympic flag bearer and Navy Veteran Brad Snyder, U.S. Olympic flag bearer Mariel Zagunis, and Vice President Joe Biden, take part in a ceremony on the South Lawn of the White House in Washington, Friday, Sept. 14, 2012, to welcome the 2012 U.S. Olympic and Paralympic teams. President Obama was presented with the flag carried by Zagunis and Snyder during the Olympics. (AP Photo/Pablo Martinez Monsivais)