The Rosenbergs were a husband and wife who were arrested and executed for selling secrets of the atomic bomb to the Soviet Union.
The hydrogen bomb was developed under the guidance of Dr. Edward Teller. It was many times more powerful than an atomic bomb and in fact required an atomic bomb to detonate. The United States exploded the first H-bomb and a few years later the Soviet Union then exploded their version of the bomb.
Sugar Ray Robinson was the middle-weight boxing champion of the world. At the time considered pound-for-pound the best boxer ever. He was also highly personable and popular.
Panmunjom, Korea is where negotiations between the United Nations—led by the United States—and the Communist North Koreans to end the Korean War took place. The separation between North Korea and South Korea was originally the 38th Parallel, but the new truce decided on a boundary between the countries that was more defensible. The countries also exchanged prisoners-of-war as a result of the Panmunjom negotiations.
Marlon Brando became a top movie actor. He was famous for his brooding and mumbling acting style. He received an Academy Award for his role in "On the Waterfront" that brought him to be a top box-office draw. Many years later, he starred in the "Godfather" movie.