US President Barack Obama (C) walks off Air Force One with his daughter Malia (L), First Lady Michelle Obama (2nd R) and Sasha (R) as they arrive in Santiago, Chile, March 21, 2011. Obama arrived in Chile Monday on the second stage of his five-day tour of Latin America. He was due to promote democracy and economic growth in Chile as part of his tour aimed at bolstering trade and investment. AFP PHOTO/Jim WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)