Underclassmen listen from the back of the stadium as US President Barack Obama speaks at a commencement ceremony at the United States Military Academy at West Point, New York, May 28, 2014. Obama's commencement address here is the first in a series of speeches that he and top advisers will use to explain US foreign policy in the aftermath of conflicts in Iraq and Afghanistan and lay out a broad vision for the rest of his presidency. [Photo/Agencies]