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/556930'></iframe> Download Embed Share Mattis Speaks at AUSA Annual Meeting Defense.gov Oct. 9, 2017 | 33:05 Defense Secretary Jim Mattis delivers the keynote address at the Association of the United States Army's Annual Meeting and Exposition in Washington, Oct. 9, 2017.