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/348819'></iframe> Download Embed Share National Guard Special Forces Combat Divers Train at Underwater Operations School National Guard Bureau July 1, 2014 | 2:27 Special Forces Combat Divers and additional members of the National Guard's 3rd Battalion, 20th Special Forces Group, train at the Army Special Forces Underwater Operations School in Key West, FL. Already certified combat divers attended to refresh their skills during a re-qualification, while other members were preparing to attend the Army's Combat Diver school in the upcoming months. As the coveted course has a high attrition rate, those scheduled to attend the course must do a great deal of preparation.