He'll be training with Mo Farah, Galen Rupp, Ciaran O'Lionard and others.
He will now switch to cross country.
He's now a real pro.
He recently turned pro last November.
He had a breakthrough season last year.
A short, but sweet look at the latest running news from around the world.
New marketing deals for Ryan Hall and Deena Kastor.
He admits not being surprised making the podium.
He became the youngest American to ever medal in the 1500m event.
American Matt Centrowitz took the bronze.