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 chats with Dr. Timothy Barton of SAIC (NYSE: SAI ) about how the company's autonomous submarine track and trail program.
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