Legendary country musician Willie Nelson held a two-day music concert for his 90th birthday party.
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The first pieces of the Berlin Wall were dismantled, starting at Brandenburg Gate.
Rockstar Games released Grand Theft Auto IV, the sixth in the GTA series, for PlayStation 3 and Xbox 360.
Prince William and Kate Middleton tied the knot.
The galaxy Centaurus A was discovered by Scottish astronomer James Dunlop.
British Lieutenant James Cook became the first European to reach Australia's east coast.
