As the bell sounded for the final lap of the women’s 1500, American Morgan Uceny appeared in perfect position. She was part of a large pack, comfortably running on the outside of lane one. She looked strong, ready to shift gears in what had been a slow-paced race up to that point. Then, disaster stuck. She fell to the track, her feet apparently clipped by either the Ethiopian runner beside her, the Kenyan runner behind her or the Russian in front of her. Even from slow-motion replays, it wasn’t entirely clear what caused her tumble.
Unlimited access to BostonGlobe.com for only 99 cents for the first 4 weeks.Sign up
Are you a home delivery subscriber?
Get FREE access as part of your print subscriptionStart Here
Contact us for help