In this photograph taken on July 4, 2010, President Barack Obama and First Lady Michelle Obama march to music in the Blue Room before heading out onto the South Portico. On the South Portico, President Obama addressed the estimated 1,200 group of military families gathered on the South Lawn for Fourth of July celebrations. Guests ate a traditional Fourth of July barbecue and listened to performances from The Killers, Brandi Carlisle, Cedric the Entertainer, and the United States Marine Band. This photograph was taken by Pete Souza.