The Simpson’s 636th episode aired, making it the longest episode count of any TV series in history.
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The US Army freed 32,000 concentration camp prisoners in Dachau, Germany.
An EF4 multiple-vortex tornado destroyed areas of two major Alabama cities: Tuscaloosa and Birmingham.
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.
Adolf Hitler and Eva Braun got married in Berlin, Germany.
