Saccharin is accidentally discovered, the 22nd Amendment is ratified, Michael Jackson wins his first Grammy, and Mister Rogers dies, all on this day.
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Public domain
1951: The 22nd Amendment to the United States Constitution, limiting presidents to two terms, is ratified. In 1940, Franklin D. Roosevelt became the only president to be elected to a third term. In the 1944 election, during World War II, he won a fourth term, but suffered a cerebral hemorrhage and died in office the following year. Thus, Roosevelt was the only U.S. president to have served more than two terms.