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flag The U.S. Navy successfully tested four unarmed Trident II D5 missiles from a submarine, confirming the reliability of its sea-based nuclear deterrent.

flag The U.S. Navy successfully conducted four unarmed flight tests of Trident II D5 Life Extension missiles from an Ohio-class submarine off Florida’s coast September 17–21, 2025, confirming the reliability and readiness of the nation’s sea-based nuclear deterrent. flag One launch was visible from Puerto Rico. flag The tests, part of routine evaluations, involved submerged launches into the Atlantic with safety measures in place. flag The Trident II D5, originally developed in the 1980s, remains operational through the 2040s after a 2017 life-extension program. flag This marks the 197th successful test of the system, which is a key component of the U.S. nuclear triad. flag The launches were not tied to global events and underscore ongoing efforts to maintain deterrence while advancing next-generation strategic systems.

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