Answer:
Frederick Douglass was a truly extraordinary person. He was born into slavery but learned how to read and write. He was a very persuasive person, an abolitionist, he influenced and advised the leaders of the United States and he even edited a very influential black newspaper for 16 years. He was internationally famous as an orator and writer.
Julius and Ethel Rosenberg were Jewish American citizens who were convicted, with others, of conspiracy for espionage on behalf of the Soviet Union in the late 1940s, when it was an ally of the United States during World War II. They were tried, convicted, and executed by the federal government of the United States.
This policy was called "containment" - the idea was to contain communism from spreading to new countries without trying to actively challenge the communist system in the countries that already had it.
This policy lead to some proxy wars, in which the US fought the Soviet Union for the free countries.
