I've always known that sporting people frequently suffer from joint problems because of the repeated strain they put on their bodies to get to the top. But somehow I never thought it would happen to me.

'm so fortunate to have done what I love to do for so long, but the day I retired was one of the best days of my life. Not because I was happy to get away from the sport, but because it was clear in my mind that I had done all I possibly could, and that it was time to go.

The trials on the road to world harmony are no greater than the courage of those who accept the challenge.

When I run - you can see my record - I run to win.

I work with the Carl Lewis Foundation focusing on youth from high school down.

My life isn't interesting! It's my mom. You need to write her life and put me in it. I'm a cameo in her life.

I want to be remembered as a person who felt there was no limitation to what the human body and mind can do and be the inspiration to lead people to do things they never hoped to do.