Willpower...determination..

Willpower. Determination. 
This is it right there.
This young gal has it for sure.

In story click on the link for video, she is at 19:30 minutes.
Check it out, you will be touched.
Grab some kleenex first.

http://www.nytimes.com/2010/12/02/sports/02runner.html?_r=1