Last updated at 13:30
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Pictures: London 2012 Olympic venues

Check out where all the 2012 Olympic action will be taking place
The countdown is on - it's now just one year until the London 2012 Olympics kicks off.
Olympic Park
The Olympic site is so big you need a map to work out where all the different venues are.
Map of Olympic site
Here's the aquatic centre where British Olympic stars like diver Tom Daley and swimmer Rebecca Adlington will be going for gold. The aquatic centre will use at least 10 million litres of water!
Aquatic centre
And this is where the Canoe Slalom competition will happen - at the nearby Lee Valley White Water Centre.
Lee Valley White Water Centre
Most of the venues will be based in the Olympic Park in east London in and around Stratford - but some will be in other parts of London.
Olympic Park
Footie fans will be heading a few miles across the city to where all the matches will take place - at the famous Wembley Stadium.
Wembley Stadium
And this is where the beach volleyball will happen - at Horse Guards Parade near Buckingham Palace. Thousands and thousands of tonnes of sand are being brought in to create beaches for the event.
Horse Guards Parade
The Dome in Greenwich will host the London 2012 gymnastics events.
The Dome in Greenwich
And Wimbledon will be where all the Olympic tennis stars will head to compete.
Wimbledon
Back in East London, this is the velodrome where cycling stars including Sir Chris Hoy will be racing against the best cyclists in the world, hoping for another Olympic gold medal.
The London 2012 velodrome