Pope John Paul II established World Youth Day, an event for young Christians around the world.
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The Zodiac Killer claimed two more victims.
Lady Gaga signed a Las Vegas residency deal for $75 million at MGM Park Theatre.
Gangs of New York, starring Leonardo DiCaprio, Daniel Day-Lewis, and Cameron Diaz, was released.
US President Barack Obama received a vaccine jab against the swine flu.
Adolf Hitler was freed from jail early.
