Modern Marvels — Episode 64: U-Boats

You are watching the episode U-Boats They dominated the Atlantic Ocean from Europe to the eastern coast of the U.S. They struck against Allied shipping with near impunity, holding England in a stranglehold for the first years of WWII–until sonar was developed. Now the hunters became the hunted. Meet German commanders and crewmen who survived service in “Iron Coffins”.