At the base of its periscope, an upside-down broom indicated that the submarine sank an enemy ship, a Navy symbol still in use today. "Any US Navy ship that is flying that broom has made a clean ...

Five years ago, for instance, it started building a new class of ballistic missile submarines called Columbia, the perceived replacement for the aging Ohio class. The U.S. Navy plans a fleet of 12 ...

14 (UPI) --The U.S. Navy is building four new nuclear ... to announce the names of the future attack submarines which will protect us from deep below the ocean's waves." Advertisement Those ...