Roger Black on 100 days countdown

There are now just 100 days to go before the opening ceremony of the London Olympics.

The official motto for the games is 'inspire a generation'.

BBC Radio 5 live's Tony Livesey asked Roger Black, an Olympic silver medallist, when interest in the games will "explode" and who should light the Olympic cauldron.

To listen to other Radio 5 live interviews, please visit the Best Bits page.

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