AP Photo/J. Scott Applewhite
Music star Fergie sang the National Anthem before the president greeted the crowd. Tickets for the event were issued to 30,000 people from 45 states, many of whom signed up for the free tickets on the White House Web site. It was the first time that tickets for the event were distributed online, a method that replaced having to stand in line -- often for hours -- at the Ellipse Visitor Pavilion or at the White House.