Double flake

What do Sanya Richards and Jeremy Wariner have in common? Well, they both represent the US in the 400m, they had both posted the fastest times in the world in the lead up to Beijing and were considered favourites for the gold medal, they both went out fast in their respective finals and were ran down in the last 50m and they are both under the tutelage of Clyde Hart who used to coach the 400m world record holder, Michael Johnson. It would seem to me that while their speed certainly isn't in doubt, their mental fortitude when under pressure is.