Take a solemn flight of discovery with this drone footage of iconic WWI memorials, including the Douaumont Ossuary in France, ...

SAN DIEGO (FOX 5/KUSI) — A team of researchers captured high-definition pictures of a sunken World War I-era U.S. Navy submarine off the coast of San Diego, over a century after it was lost at sea.

The battleship era is officially over, as the United States no longer operates a single one. Here is every class to hit the water since the dreadnought.