Idris Elba
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Idris Elba's high-speed circuit of US Nascar track

Film and TV star Idris Elba has been touring the US as part of a series about the history of underground racing.

Nascar racing is the second most lucrative sport in the US, behind American football, with top drivers such as Dale Earnhardt Jr earning $25m a year.

While making the programme, Elba got the chance to drive a racing car at Watkins Glen track in New York.

Watch the first episode of Idris Elba: King of Speed on BBC Two at 20:15 GMT on Thursday 26 December or catch it later on the BBC iPlayer.

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