Klaus Fuchs was just one of the many eccentrics chosen to work on the Manhattan Project. People remembered him as being serious, quiet, and earnest. He was also a spy — whose eventual capture lead to both the Red Scare and the arrest of the Rosenbergs.
The Roswell crash is the Holy Grail of American conspiracy-theory folklore, but what if the little grey men were actually little grey Russians in Nazi-designed aircraft? Somehow, that still isn't the craziest theory out there. Area 51 by Annie Jacobsen explains.