Sweltering Boston Marathon takes its toll on racers
Wesley Korir, of Kenya, smiles after crossing the finish line to win the 116th Boston Marathon in Boston, Massachusetts April 16, 2012.JESSICA RINALDI
Second place finisher in the women's wheelchair division of the Boston Marathon Wakako Tsuchida of Japan (R) hugs women's wheelchair division winner Shirley Reilly at the 116th Boston Marathon in Boston, Massachusetts April 16, 2012.JESSICA RINALDI
Wesley Korir reacts as he gets his medal after winning the men's division of the 116th Boston Marathon in Boston, Massachusetts April 16, 2012.JESSICA RINALDI
Sharon Cherop of Kenya, winner of the women's division of the 116th Boston Marathon, holds up the trophy for photographers in Boston, Massachusetts April 16, 2012.JESSICA RINALDI
Men's wheelchair winner Joshua Cassidy of Canada breaks the tape at the finish line of the 2012 Boston Marathon in Boston, Monday, April 16, 2012.Elise Amendola
The feet of Joshua Cassidy of Canada are tucked into his wheelchair after he won the men's wheelchair division of the 116th Boston Marathon in Boston, Massachusetts April 16, 2012.BRIAN SNYDER
Shirley Reilly of the U.S. gets a hug from her father Kevin (L) after winning the women's wheelchair division of the 116th Boston Marathon in Boston, Massachusetts April 16, 2012.BRIAN SNYDER
Wellesley College Sophomore Valerie Ludorf, of Hopkinton, Mass., cheers for the runners along the route of the 116th Marathon in Wellesley, Massachusetts April 16, 2012. REUTERS/Gretchen Ertl (UNITED STATES - Tags: SPORT ATHLETICS)Gretchen Ertl/Reuters
Winner of the women's division of the Boston Marathon Sharon Cherop of Kenya (L) and second place finisher Jemima Jelagat Sumgong of Kenya react after crossing the finish line of the 116th Boston Marathon in Boston, Massachusetts April 16, 2012.BRIAN SNYDER
Empty water cups lie on the course near a watering station during the Boston Marathon in Wellesley, Mass., Monday, April 16, 2012. It was the second-slowest Boston race since 1985, as temperatures rising into the 80s slowed the leaders and may have convinced as many as 4,300 entrants to sit this one out.Michael Dwyer
Wellesley College Sophomore Mayrah Udvardi, of Canberra, Australia, gives a runner a kiss along the route of the 116th Marathon in Wellesley, Massachusetts April 16, 2012.Gretchen Ertl
A runner feels the heat along the route of the 116th Marathon in Wellesley, Massachusetts April 16, 2012.Gretchen Ertl
A runner douses himself with water along the route of the 116th Boston Marathon in Wellesley, Massachusetts April 16, 2012.Gretchen Ertl