New York City May Day parade of 1950, and US Supreme Court justices in 1950

As June 18th, 1953 approached, demonstrations intensified. Supreme Court Justice William Douglas intervened at the last moment to delay the execution of the Rosenbergs. A special court meeting was convened to discuss whether their conviction should have been under the Espionage Act of 1917 or the Atomic Energy Act of 1946.

What significant event occurred on June 18th, 1953?

Who delayed the execution of the death penalty for the Rosenbergs?

What was the reason for the special meeting of the court?

Under which act were the Rosenbergs convicted?

What was the Atomic Energy Act of 1946 in relation to the case?