The Simpson’s 636th episode aired, making it the longest episode count of any TV series in history.
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British Lieutenant James Cook became the first European to reach Australia's east coast.
In the Los Angeles Public Library, a fire broke out, destroying 400,000 books.
Prince William and Kate Middleton tied the knot.
Rockstar Games released Grand Theft Auto IV, the sixth in the GTA series, for PlayStation 3 and Xbox 360.
Legendary country musician Willie Nelson held a two-day music concert for his 90th birthday party.
