Graduation Ceremony Defense Secretary James N. Mattis shakes hands with a newly commissioned second lieutenant at the U.S. Air Force Academy's graduation ceremony in Colorado Springs, Colo., May 23, 2018. Mattis was the event's featured speaker. Air Force photo by Bill Evans SHARE: Download: Full Size (1.42 MB) Credit: Bill Evans VIRIN: 180522-F-QA895-5281C.JPG Photo Gallery