The Kenyan led from wire-to-wire to become the first man in history to run under 1:41.
Matthew Centrowitz finishes fourth as the U.S. brings home another distance medal.
Asbel Kiprop makes it look easy in the men's 1,500 meters.
Mario Fraioli shares his top-10 moments from last week's Olympic Track & Field Trials. What were yours?
The 800m champion isn't afraid to speak his mind.
Mario Fraioli wraps up an exciting end to the first half of competition!
Men's and women's steeplechase and 5,000-meter prelims also got underway on Monday night.
Khadevis Robinson ribs champion Nick Symmonds about the "secrets" of his training program.
Ashton Eaton sets a decathlon world record on the second day of competition.
World-record holder David Rudisha is hoping for a fast 800m.