FILE - In this Nov. 19, 2012 file photo, U.S. President Barack Obama, left, meets with Myanmar's President Thein Sein at the Yangon Parliament building in Yangon, Myanmar. The United St

 

              FILE - In this Nov. 19, 2012 file photo, U.S. President Barack Obama, left, meets with Myanmar
FILE - In this Nov. 19, 2012 file photo, U.S. President Barack Obama, left, meets with Myanmar's President Thein Sein at the Yangon Parliament building in Yangon, Myanmar. The United States is unwinding two decades of sanctions against Myanmar, as the country's reformist leadership oversees rapid-fire economic and political change. Obama's visit this week, the first by a serving U.S. president, is a sign of how far relations have come. But Washington continues to take a calibrated approach to easing sanctions, keen to retain leverage should Myanmar's reform momentum stall. (AP Photo/Carolyn Kaster, File)