See inside a WWII-era U-boat, the only submarine that the US Navy captured intact and towed home
Germany's U-505 submarine was the 1st warship captured by the US Navy in over a century and top secret during World War II.
The Star37m
When Carter met Kim - and stopped a nuclear war
All this may not have happened if not for a set of diplomatic chess moves by Carter, who died aged 100 on 29 December.