As the United States marks its 250th anniversary, WTOP presents “250 Years of America,” a multipart series examining the innovations, breakthroughs and pivotal moments that have shaped the nation ...

Add Yahoo as a preferred source to see more of our stories on Google. General Dynamics Electric Boat officials, U.S. Navy officials and other guests gather at a christening ceremony for the Utah ...

Submarines are among the most advanced and mysterious machines ever built. Designed to operate beneath the surface of the sea ...