Flato died of kidney failure in Hyannis, Massachusetts, on January 1, 1984. Only after the fall of the [[Soviet Union]] when the files of the KGB became open to researchers was it discovered that he was spying for the Soviets in the 1940's. | Flato died of kidney failure in Hyannis, Massachusetts, on January 1, 1984. Only after the fall of the [[Soviet Union]] when the files of the KGB became open to researchers was it discovered that he was spying for the Soviets in the 1940's. |