The 29-year-old has not run a full marathon since the Olympic Trials last year.
No athletes have dropped out due to security concerns.
He was the surprise winner in the British capital last summer.
Distance runner explains an infamous workout that elite Kenyans do twice a week.
The Ugandan gold medalist is gearing up for the London Marathon.
Two-time world champion expects to break the mark in Moscow.
American Dathan Ritzenhein runs a strong race to finish third overall.
Expect some fast times in the Big Apple this weekend.
World Championships bronze medalist Bob Tahri of France to make half-marathon debut.
It's filled with world champions and record holders.