Brazilian President Dilma Rousseff greets US President Barack Obama, First Lady Michelle Obama (R) and daughters Sasha (2nd L) and Malia (2nd R), upon their arrival at the Palacio do Alvorada, the official residence, for a reception, in Brasilia, Brazil, March 19, 2011. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)