Answer:
Revelations that spies in the US atomic program had passed secrets to the Soviet Union set off a nationwide panic that communist spies might be infiltrating many American institutions.
When it came to light that Soviet spies in the US atomic program had passed secrets to Russia, Americans began to worry that spies might be lurking in every corner of society. In the late 1940s and early 1950s, there were several highly-publicized espionage trials that convicted leading scientists and government figures of espionage, culminating in the 1953 execution of scientist Julius Rosenberg and his wife Ethel for passing information about the atomic bomb to Russia. These convictions served to justify fears that spies could be active throughout the country.
The 'New Immigrants' came to the United States after the Civil War from all the following countries except "Poland," since these were identified as a different "class" of immigrant.
Answer:
In a dramatic speech to a joint session of Congress, President Harry S. Truman asks for U.S. assistance for Greece and Turkey to forestall communist domination of the two nations. Historians have often cited Truman's address, which came to be known as the Truman Doctrine, as the official declaration of the Cold War.
Explanation:
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