ARLINGTON, VA – NOVEMBER 11: A Secret Service counter assault team member surveys the area from on top of the Memorial Amphitheater during a Veterans Day full honor ceremony at Tomb of the Unknowns at Arlington National Cemetery November 11, 2011 in Arlington, Virginia. President Barack Obama later delivered remarks at the cemetery amphitheater after laying a wreath at the tomb. (Photo by Chip Somodevilla/Getty Images)