The US Army freed 32,000 concentration camp prisoners in Dachau, Germany.
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Rockstar Games released Grand Theft Auto IV, the sixth in the GTA series, for PlayStation 3 and Xbox 360.
British Lieutenant James Cook became the first European to reach Australia's east coast.
The Simpson's 636th episode aired, making it the longest episode count of any TV series in history.
In the Los Angeles Public Library, a fire broke out, destroying 400,000 books.
Prince William and Kate Middleton tied the knot.
