Today's programme comes to you from St Paul's Cathedral, and we ask whether the Olympic Games are fair. One mistake or an injury can destroy years of preparation, and some of the world's best sports stars have never won Olympic gold. And we hear from two Olympic 800m champions, Maria Mutola and Madeline Manning-Mimms, with an amazing story of being the only black athlete on the US team in 1968.

By the way, we have a video interview with Madelaine Manning-Mimms here.