President Barack Obama celebrated his 52nd birthday on Sunday surrounded by friends at his Camp David retreat. Obama kicked off his weekend on Saturday with a round of golf at Joint Base Andrews with friends from his childhood home of Hawaii, Chicago, where he lived before becoming president, as well as aides past and present. It is reported that the winners of the game got to join Obama in the presidential helicopter while the losers had to take a long car ride to the retreat, in the Catoctin Mountains, Maryland.