Things we believed during the Cold War that ended up being wrong

Ethel Rosenberg was definitely guilty
You'd think Ethel Rosenberg's guilt was a settled matter. In 1951, she and her husband, Julius, were convicted of stealing atomic secrets and passing them to the Soviet Union. Two years later, they were executed in the electric chair. While international organizations called them the victims of a witch hunt, most Americans stood by their sentence (via History Channel). In 2014, the narrative of Ethel's guilt got a nasty shock. Following a close-to-deathbed confession from her brother, David Greenglass, it began to look like Ethel may have been less "guilty" and more "framed."