On February 20, 1939, the German American Bund organized a rally of 20,000 Nazi supporters at Madison Square Garden in New York City. When Academy Award-nominated documentarian Marshall Curry stumbled upon footage of the event in historical archives, he was flabbergasted. Together with Field of Vision, he decided to present the footage as a cautionary tale to Americans. The short film, A Night at the Garden, premieres on The Atlantic today.