Out of the tens of thousands of prosthetic legs they've made, there's never been any 400-meter athletes run under 50 seconds. So, if this was such a technologically advanced prosthetic leg, then how come not everyone's qualifying, or coming close to the qualification time, then?

I'd like to show people that if you put the hard work in and you believe in yourself, then you can do whatever you want to.

I think every athlete that’s just out here for the Olympics just does something to inspire those around them and inspire each other.

There is a big difference between being good and being great.

I can have my goals, and I can have my dreams. My goal is to make the finals and improve my position. I want to run all decent races. I don't want to look back and say I ran a terrible race.

I've been followed home late at night. I've been shot at on the highway.

When you're competing, you don't have the choice of what the weather will be like. It really doesn't affect me. I ran one of my fastest times in the New York Diamond League meeting last year. It was raining pretty hard then.