It was effectively an enlarged crewed torpedo, combining in its design engineering solutions typical for torpedoes and for midget submarines ... in America isn't a Big Mac, according to data.

A treasure trove of vital German intelligence, the submarine's capture was top-secret. See inside the U-boat, now a permanent exhibit at Chicago's Griffin Museum of Science and Industry.

An curved arrow pointing right. We got an inside look at how the United States Navy trains sailors to work on Submarines during its eight-week course at the Basic Enlisted Submarine School at ...

A treasure trove of vital German intelligence, the submarine's capture was top-secret. See inside the U-boat, now a permanent exhibit at Chicago's Griffin Museum of Science and Industry. Submarine ...