To avoid capture, the Germans attempted to sink the U-boat with time bombs throughout the submarine and opened a sea strainer that caused water to rush inside the hull. US Navy sailors who boarded ...

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.

These subs can also be used for naval and anti-submarine warfare in shallower waters. On average, the largest submarines in service are ballistic missile-armed. As these submarines are intended ...