David Rudisha's coach says they are looking for an "extra edge."
Harsh conditions couldn't stop the 800m world-record holder on Saturday.
Asbel Kiprop redeemed himself in the 1500m.
East African rivalries about in the distance events.
He's going against the world-record holder David Rudisha in NYC.
Irishman Colm O'Connell sits down for an interview with the IAAF.
He will be running at the Diamond League Meeting on May 25.
The East African nation didn't live up to expectations at the Games.
Despite a recent loss, the Kenyan maintains his greatness.