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Secrets Declassified with David Duchovny • SEASON 2 EPISODE 18

Top Secret Tech

Secrets Declassified with David DuchovnySeason 2Episode 18Aug 6, 202642 min

Before they became instruments of war, they sounded like impossible ideas. An American medical student develops a closed-circuit rebreather that allows Allied frogmen to slip beneath enemy harbors without a single bubble.

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