Look at the signs. The Fastest Kenyan Sprinter is only capable of 10.52.. How is it possible to run 9.76...Drugs Right..
I am just writing this to make the point that just because there is a time difference between the best african and the best american distance runner the gap is not necessarily dur to drugs. It could be because American runners don't train and work together. They don't have the time to train because they need to work, they don't have good coaching. They have a genetic disadvantage, Like the genetic disadvantage that east africans have in sprinting against west africans.
Anyway, just wanted to make my point