August 14, 1935: Social Security Act signed into law by FDR

August 13, 1961: Berlin is divided into east and west

August 12, 1990: Largest T-rex skeleton ever discovered

August 11, 1972: Last U.S. ground combat troops leave Vietnam

August 10, 1846: Smithsonian established

August 8, 1974: President Nixon formally resigns from office