President Obama pauses before he delivers commencement address for 2012 graduating class at Barnard College in New York

 
President Obama pauses before he delivers commencement address for 2012 graduating class at Barnard College in New York
U.S. President Barack Obama pauses before he delivers the commencement address for the 2012 graduating class at Barnard College in New York May 14, 2012. REUTERS/Larry Downing