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/638535'></iframe> Download Embed Share Face of Defense - MSgt Patrick McKenna Defense.gov Nov. 7, 2018 | 0:57 Air Force Master Sgt. Patrick McKenna loves being able to work with his hands. He’s been doing just that for the Air Force for the past 13 years while serving as a crew chief for F-16 Fighting Falcon jets. This is his story.