On June 13, 1942, four Nazi spies disembarked their U-Boat on a beach near Long Island, New York. Four days later, a similar group landed on Ponte Verda Beach, Florida. Their goal: to harm American economic targets in the hope of turning the war back in favor of Germany. The men had been extensively trained at a sabotage school near Berlin and carried enough explosives, primers, and incendiaries to support two years worth of destruction. They carried plans with them that outlined attacks of New York’s Hell Gate Bridge, hydroelectric plants at Niagara Falls, aluminum plants in Philadelphia, the canal lock systems in Cincinnati and St. Louis, and other targets.