COMMENCEMENT SPEECH President Barack Obama speaks at the graduation ceremony for the U.S. Air Force Academy in Colorado Springs, Colo., May 23, 2012. Obama called the academy's class of 2012 "exceptional" for the spirit embodied in its class motto: "Never Falter, Never Fail." SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 165997-Z-WPF69-781.jpg Photo Gallery