He's suffering from a nagging hamstring injury.
Unprecedented anti-doping program will launch in Daegu later this month.
The Salazar-coached training partners defeated a pair of Ethiopian runners.
He's struggled with injury this year, but his agent says he's ready to race.
That's what Haile's manager thinks.
The championships are now held every other year.
John Hancock will continue awarding $50K bonuses for world-best times, however.
Geoffrey Mutai's world-leading time at Boston won't count as a world record.
The great Ethiopian marathoner admits Boston is no cakewalk.
The wind was a factor in the IAAF gold-label marathon in China.