He is making a comeback after dropping out of New York last year.
American Khadevis Robinson pulls off upset win in men's 800 meters.
The championships are now held every other year.
One member of the team comes from the hardest-hit part of Japan.
He's a 2:04 marathoner.
The winner at the Kenyan trials thinks she deserves the gold.
The Ethiopian champion has been battling injury for over a year.
The marathon had previously been held every year since 1980.
None of its 2010 gold medalists are running this year.
His race in Puerto Rico last weekend is the center of controversy.