In 1981, President Ronald Reagan, above, was shot and seriously injured outside a Washington, D.C., hotel by John W. Hinckley Jr.; also wounded were White House press secretary James Brady, Secret Service agent Timothy McCarthy and a District of Columbia police officer, Thomas Delahanty.
1822: Florida became a United States territory.
1870: The 15th Amendment to the U.S. Constitution, which prohibited denying citizens the right to vote and hold office on the basis of race, was declared in effect by Secretary of State Hamilton Fish.
1923: The Cunard liner RMS Laconia became the first passenger ship to circle the globe as it arrived in New York.
1945: During World War II, the Soviet Union invaded Austria with the goal of taking Vienna, which it accomplished two weeks later.
1964: The original version of the TV game show "Jeopardy!," hosted by Art Fleming, premiered on NBC.