Jefferson Davis becomes the president of the Confederacy, Pluto is discovered, a cow flies, the first Church of Scientology is formed, the Chicago Seven are found not guilty, and Dale Earnhardt dies at the Daytona 500, all on this day.
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Department of Energy
1967: Physicist J. Robert Oppenheimer, often called the "father of the atomic bomb" for his role in the Manhattan Project, the World War II project that developed the first nuclear weapons, dies at the age of 62 in Princeton, N.J., three days after falling into a coma. Oppenheimer had been diagnosed with throat cancer in 1965 and underwent unsuccessful radiation treatment and chemotherapy late in 1966.