The US Army freed 32,000 concentration camp prisoners in Dachau, Germany.
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The first pieces of the Berlin Wall were dismantled, starting at Brandenburg Gate.
Prince William and Kate Middleton tied the knot.
The galaxy Centaurus A was discovered by Scottish astronomer James Dunlop.
An EF4 multiple-vortex tornado destroyed areas of two major Alabama cities: Tuscaloosa and Birmingham.
Adolf Hitler and Eva Braun got married in Berlin, Germany.
