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U.S. History
What year was the polio vaccine developed by Jonas Salk?
U.S. History
What year was the polio vaccine developed by Jonas Salk?
1920
1966
1936
1955
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Which first lady had the honor of being both the wife of a President, and the mother of a President?
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What order, similar to a law, may be issued by a U.S. President?
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Senator and failed Presidential candidate Hubert Humphrey hailed from which state?
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