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Last Updated: Thursday December 09 2010 18:28 GMT

Leah climbs London's tallest building

At Newsround we like to give our presenters a challenge. So we asked Leah to face her fear of heights by climbing London's tallest tower, the Shard.

When it's finished the Shard will be 309 metres high, making it the tallest building in Europe.

But has Leah got what it takes to make it to the top?

Find out how high she climbed here!