John Lennon, songwriting genius and founding member of The Beatles — a man who gifted the world with beautiful music that still rouses the human spirit long after his death — was murdered in New York City on this day in history, Dec. 8, 1980. He was 40 years old. "An unspeakable tragedy," legendary sports host Howard Cosell blurted in shock to the nation near midnight, interrupting the dramatic final seconds of a Monday Night Football broadcast. ON THIS DAY IN HISTORY, DEC.