A look back at Jenny Simpson's career in pictures.
The 25-year-old Californian has the fourth-fastest time in the 800m this year.
The silver medalist dedicated his finish to his gay and lesbian friends.
The American was passed by Ethiopian Mohammed Aman with 20 meters to go.
Bernard Lagat, Ryan Hill, and Galen Rupp all run qualifying times.
In just over a year, the American has become a world-class steeplechase runner.
American Shalane Flanagan was eighth.
The American record-holder says it was her farewell to high-level marathons.
Valentine Jepkorir was able to catch a flight to Moscow two days later.
The 1500m champion has a vertical tear in her hamstring.