A submersible vessel used for taking tourists to see the wreckage of the Titanic in the North Atlantic has gone missing, triggering a search-and-rescue operation, the US Coast Guard said on Monday.

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To this end, naval operators are exploring asymmetric strategies to maintain their edge. These include deploying uncrewed underwater vehicles (UUVs) to mask submarine signatures. Other potential ...

Rocket K/Getty Images for Paramount Pictures Tom Cruise pushed the limits while doing his own stunts for Mission: Impossible ...

Here's a light fixture from the tug — an eerie window into a different time. As the scientists were exploring the tug, they were perplexed by a bright white object hanging around the bow.