The iron curtain was like a curtain. It separated parts of Europe and was hard to escape the communism.
They were executed by the electric chair.
The Rosenbergs were executed for conspiracy to commit espionage on June 19, 1953. The other spies who were caught did go to federal prison, but Julius and Ethel Rosenberg were both executed by electric chair.
To gain the southerners' support, Douglas proposed creating two territories in the area–Kansas and Nebraska and repealing the Missouri Compromise line. The question of whether the territories would be slave or free would be left to the settlers under Douglas's principle of popular sovereignty