1927 – The Ford Motor Company unveiled the Model A automobile. It was the successor to the Model T.

1942 – A self-sustaining nuclear chain reaction was demonstrated by Dr. Enrico Fermi and his staff at the University of Chicago.

1981 – Britney Spears was born Singer, TV judge (“The X Factor”)

1982 – Doctors at the University of Utah implanted a permanent artificial heart in the chest of retired dentist Barney Clark. He lived 112 days with the device. The operation was the first of its kind.

1998 – Microsoft Corp. chairman Bill Gates donated $100 million to help immunize children in developing countries.