A leading medical expert thought so back in 1969.
The two-time defending champion will have his hands full in this year's half marathon.
Harsh conditions couldn't stop the 800m world-record holder on Saturday.
Organizers are hoping to recreate the huge success of the 2007 event.
The 27-year-old is having a breakthrough year.
57-year-old ran 250 marathons in 2010.
The revolutionary device, typically favored by distance runners, has found a new user: sprinter Sanya Richards-Ross.
Rhonda Copeland started losing her vision in the 1990s.
Olympic bronze medalist Deena Kastor is on the women's squad.
Race-day conditions should be perfect for racers.