Legendary country musician Willie Nelson held a two-day music concert for his 90th birthday party.
Indonesia announced plans to move its capital city from Jakarta due to the city sinking.
The Simpson's 636th episode aired, making it the longest episode count of any TV series in history.
Prince William and Kate Middleton tied the knot.
An EF4 multiple-vortex tornado destroyed areas of two major Alabama cities: Tuscaloosa and Birmingham.
Rockstar Games released Grand Theft Auto IV, the sixth in the GTA series, for PlayStation 3 and Xbox 360.
The TV Land Network made its debut.
The first pieces of the Berlin Wall were dismantled, starting at Brandenburg Gate.
In the Los Angeles Public Library, a fire broke out, destroying 400,000 books.
Space Patrol aired the first 3D television show.
Adolf Hitler and Eva Braun got married in Berlin, Germany.
The US Army freed 32,000 concentration camp prisoners in Dachau, Germany.
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.
