The Kenyan was tested in late September before defending her Chicago Marathon title.
Toni Reavis explains why the Boston Marathon is such a big deal.
There is $500,000 World Marathon Majors title is on the line.
The running community applauds these efforts.
It’s much easier to talk about anti-doping than to actually do it, and so far, it’s not clear what the plan is.
Announcement comes on same day that three Kenyan marathoners get banned for doping.
It's now the sixth event in the series.
A win in New York would mean a lot, financially and otherwise, to the two Kenyan runners.
Forty thousand runners signed up in three-and-a-half hours.