TODAY IN HISTORY:
1767: Wolfgang Amadeus Mozart's first opera, Apollo et Hyacinthus — written when he was 11 years old — premieres in Salzburg.
1981: Pope John Paul II is shot and critically wounded by Turkish gunman Mehemet Ali Agca in St. Peter's Square, Vatican City.
1989: An estimated 2,000 students begin a hunger strike in Tiananmen Square, China. 2004: The final episode of Frasier on NBC is watched by 33 million people.
2013: Canadian astronaut Chris Hadfield departs the International Space Station to return to Earth.