Londoners in Trafalgar Square celebrated as the announcement was made that London will host the 2012 Olympic Games.
But the next day, there's tragedy. This bus, the number 30 in Tavistock Square, London, was hit by one of four terrorist explosions on July 7, which killed 52 people, injured 700 and brought chaos to London.
Two weeks later, four attempted bombings took place in London - the explosive devices failed to go off.
LOTR Billy Boyd joined kids as part of a Make Poverty History rally in Edinburgh before the G8 summit - a group of powerful leaders meeting to tackle global problems.
The long-awaited Harry Potter and the Half-Blood Prince hit the bookshelves and author JK Rowling launched it with a special reading inside Edinburgh Castle.
Droughts and locusts led to a food crisis in the African country of Niger, where charity Unicef says one child in four dies before the age of five through starvation.
After weeks of delays, the Discovery space shuttle blasted off from the Kennedy Space Center, USA, on a 12-day mission to take supplies to the International Space Station.
This was the scene from the air when a tornado hit Sparkbrook in Birmingham - with winds of up to 130mph!
Down but not out! Roger Federer celebrated winning Wimbledon for the third time in a row, with Venus Williams taking the women's title.
Cancer survivor Lance Armstrong won the Tour de France for the SEVENTH time. He's now retired from competitive cycling.