Player Embed Code: <iframe width='500' height='300' scrolling='no' frameborder='0' style='border: none; overflow: hidden; width: 500px; height: 300px;' allowtransparency='true' src='https://www.dvidshub.net/video/embed/796485'></iframe> Download Embed Share Joint Chiefs Chairman Delivers Commencement Speech to Air Force Academy’s Class of 2021 Defense.gov May 26, 2021 | 36:51 Army Gen. Mark Milley, chairman of the Joint Chiefs of Staff, delivers the commencement address for the graduation and commissioning ceremony of the Air Force Academy's Class of 2021, May 26, 2021.