Researchers have discovered the USS F-1, a World War I-era submarine, which had been lost at sea for 108 years.

Built in the 1950s as North American Aviation’s answer to the Air Force’s next-gen fighter-bomber competition, the F-107A Ultra Sabre packed radical features—from over-fuselage air intakes to early ...

On a foggy December morning in 1917, three U.S. Navy submarines crept through the waters off the coast of San Diego. They ...