I begins in Europe. Alexander Fleming discovers the first antibiotic, penicillin. Structure of DNA discovered. President Richard M. Nixon resigns after Watergate scandal. Henry Ford organizes the first major U.S. assembly line to produce Model T cars.
Space race begins.
FDA approves birth control pill. Dr. Jonas Salk's polio vaccine proven effective in University of Pittsburgh tests. Civil rights leader Martin Luther King assassinated in Memphis, Tenn. 1968. D-Day invasion marks the beginning of the end of World War II in Europe. Deadly AIDS disease identified.