Jacob Wong waves boldly to the crowd assembled in the U.S. Air Force Academy's Falcon Stadium after receiving his diploma from Gen. Mark Welsh, Air Force chief of staff. Wong, as the last cadet to cross the stage, earns the name "Tail End Charlie," a graduation tradition. The U.S. Air Force Academy Class of 2015 graduation ceremony was held in the Academy's Falcon Stadium in Colorado Springs, Colo., May 28, 2015. (Air Force photo by Jason Gutierrez) (released)