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/755239'></iframe> Download Embed Share US Airmen in Australia keep an ear to the ground AFN Yokosuka Aug. 28, 2019 | 2:00 Airmen assigned to the 709th Technical Maintenance Squadron, Detachment 421, explain the importance of their mission in Alice Springs, Australia. The Airmen are responsible for maintaining a 20-sensor seismic array, which monitors vibrations in the Earth’s crust and can detect nuclear detonations.