The stars are seeing the growth of running in their native countries, hoping it continues.
Foreign agents cannot work in the country for at least six months while investigations are taking place.
Here are photos of the elite races at the 2014 New York City Marathon.
Check out some of the action from the Big Apple!
Here are nine things you may not have known about the fastest marathoner in history.
The Kenyan broke the world mark at the Berlin Marathon last year.
One exercise physiologist thinks its imminent and will happen sooner rather than later.
The pair will compete at the Mattoni Olomouc Half Marathon on June 21.
Mo Farah placed eighth in his full marathon debut but vowed to run another one.