Modern Marvels

Nordhausen (9x35)

Air date: Aug 13, 2002

It was the world's largest underground factory--seven miles of tunnels built to manufacture Hitler's secret weapons, primarily the V-2 rocket. But Nordhausen kept more than one secret. Technology and torture went hand-in-hand--25,000 concentration camp workers died there--and some of those associated with Nordhausen later helped take America to the moon.