28-year-old Kenyan moves from the track to the road.
The fastest marathoner in history says he has let bygones be bygones regarding his Olympic snub.
He wants to bring home the 10,000m gold in London.
A relatively unknown Denis Koech prevailed against the pre-race favorites.
He found a new gear in the cross-country race with 200m to go.
He defeated the Kenyan record holder and this year's Boston Marathon champion.