They brought back specimen samples
The Sacco and Vanzetti case, the Red Scare, and the activities of the Ku Klux Klan all represent the fear of the spread of communism held by some Americans in the 1920's.
Answer:
September 1, 1939 – September 2, 1945
Explanation:
Many Americans opposed the President. These “isolationists” believed that Americans should not be involved in a war fought in Europe. This attitude changed when the Japanese attacked Pearl Harbor.