US President Barack Obama (R), First Lady Michelle Obama (2nd R), walk alongside their daughters, Malia (L) and Sasha (3rd R), as well as Avery Robinson (2nd L), Obama’s nephew, and Roxanne Nesbitt (3rd L), a family friend, from Marine One after arriving on the South Lawn of the White House in Washington on August 7, 2011. The Obama family spent the weekend at Camp David, the presidential retreat in Maryland. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)