Die Glocke: The Bell Rumored to Be Nazi Germany’s Last Secret Weapon

At the end of World War II, Soviet and American forces entered Germany and opened mines, underground factories, and SS sites. They found more than paperwork. They found V-2 rockets, jet engines, laboratories, production lines moved below ground, and thousands of prisoners forced to work. Hans Kammler was one of the SS officers connected to this underground construction system and to special projects that moved war production into tunnels.