Submarines are a vital part of the United States Navy, but there is one in particular that stayed at sea for 727 days. Here's ...

The U.S. Navy has some of the most advanced nuclear submarines in the world. Its newest addition is named after an important ...

The United States has reached a milestone in building the Navy’s first next-generation submarine equipped with nuclear missiles as it races to modernize its air-, land- and sea-based strategic forces ...

The Columbia-class submarine outstrips its predecessor, the Ohio class, in many ways—but falls short in one conspicuous one.