The sub-13 minute 5,000-meter is focused on making an impact in the 10,000 meters.
The Kenyan-born American will racing shorter distances until then.
A mix of emotions crowd the sport.
A torn hamstring and now hip problems have kept the former American-record holder out of competition.
He recently fielded questions from the press about his breakthrough race.
American Morgan Uceny runs world-leading 1500m time at the same meet.
He's suffering from a nagging hamstring injury.
There were numerous world-class performances on the track Friday.
The former Wisconsin Badger says he's going for gold at the world championships.
Check out these great photos from a thrilling men's 5,000-meter final!