When you talk about world record times, you have to understand that everything must be perfect the weather, the course, the temperature. It is not always enough to be in good shape.

I want to go down in history.

When you run the marathon, you run against the distance, not against the other runners and not against the time.

I'm retiring from competitive running, not from running. You cannot stop running, this is my life.

I wanted to experience New York, to look up and see buildings.

That is not enough. Sport has been great for me, a great learning place that if you want to achieve you can, even if you are from the poorest part of Africa.

I was the kind of child who worked hard every day with the cows and sheep - I was a very aggressive boy.