The secret of Hamilton's success

Superstar sportsman Lewis Hamilton has just joined a select group of British drivers by winning his second Formula 1 World Championship.

He beat team-mate Nico Rosberg to the title by winning the last grand prix of the season in Abu Dhabi on Sunday.

It means he's the first Brit in 40 years to become a double world champ.

So, Martin's been finding out about the secret to his success by looking back at how he got started.

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