A look back at Jenny Simpson's career in pictures.
The 33-year-old stays fresh and focused during the season by going for runs
The 25-year-old Californian has the fourth-fastest time in the 800m this year.
Most coaches suggest the gradual approach in terms of race distance and training mileage.
He was out for 5 miles when he saw something suspicious going on.
The tennis legend will guide five men during their 26.2-mile journey through New York City in November.
The silver medalist dedicated his finish to his gay and lesbian friends.
She wanted to race the 1500m as well, but a clerical error cost her a spot in that event.
Runners have the chance to earn a total of six finisher medals.
Groups are trying to raise $26,500 for the project.