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/514949'></iframe> Download Embed Share Mattis Meets With NATO Secretary General Defense.gov March 21, 2017 | 0:56 Defense Secretary Jim Mattis met with NATO Secretary General Jens Stoltenberg at the Pentagon, March 21, 2017. The two leaders discussed NATO’s strong transatlantic bonds and the progress made in the fight against terrorism.