The Navy League's Sea-Air-Space Exposition is the largest maritime expo in the U.S., and brings together dozens of defense contractors and military decision-makers. The Motley Fool's Rex Moore was at the event in National Harbor, Maryland, and saw demonstrations of several technologies. In the video below he shows us how General Dynamics (NYSE: GD ) is increasing the capability of U.S. submarines, including new ways to launch and recover the Lockheed Martin (NYSE: LMT ) autonomous underwater vehicle.
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