Zimmerman Case app
Take a look at some of the worst mass shootings in U.S. history.
Sources say close to 30 people were killed, many of whom were children, during a school shooting the Sandy Hook Elementary School in Newton, Conn.
Library of Congress
The American Red Cross is established, Charles Lindbergh and Amelia Earhart complete their historic trans-Atlantic flights, Bogey and Bacall get hitched, and Susan Lucci finally strikes Emmy gold, all on this day.