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Michael Johnson carries Olympic torch at Stonehenge

12 July 2012 Last updated at 07:15 BST

Michael Johnson, the US athlete who still holds the world record in the 400 metres and won four gold Olympic medals, has carried the Olympic torch around Stonehenge.

The early morning run was a media event but Johnson will also take part in the official relay when he will run with the Olympic flame through Salisbury.

The flame will travel from Salisbury across Dorset to the fossil mecca of the Jurassic Coast, on day 55 of the torch relay.