Photos: The 117th Boston Marathon

Lelisa Desisa of Ethiopia and Rita Jeptoo of Kenya cross the finish line of the 117th Boston Marathon. (Charles Krupa/AP)

Elite female marathoners, front row from left, Rita Jeptoo, Mamitu Daska, Meserat Debele, Tirifi Beyene, Alemitu Begna, Shalane Flanagan, Ana Felix and Sabrina Mockenhaupt compete on the course in Wellesley, Mass., Monday, April 15, 2013. (Michael Dwyer/AP)

Elite mens marathoners, from left, Levy Matebo, Lelisa Benti, Markos Geneti, Micah Kogo and Gebregziabher Gebremariam compete on the Boston Marathon course in Wellesley, Mass., Monday, April 15, 2013. (Michael Dwyer/AP)

You are almost home when you see this. (Alex Ashlock/WBUR)

Chris Royer, from Coventry, Vt., raises his hands as he starts of the 117th running of the Boston Marathon, in Hopkinton, Mass., Monday, April 15, 2013. (Stew Milne/AP)

Defending champion Wesley Korir, of Kenya, warms up prior to the start of the 117th running of theBoston Marathon, in Hopkinton, Mass., Monday, April 15, 2013. (Stew Milne/AP)

Runners start the 117th running of the Boston Marathon, in Hopkinton, Mass., Monday, April 15, 2013. (Stew Milne/AP)

Jacqueline Benson shoots the starting piston for the elite womens start of the 117th running of the Boston Marathon, in Hopkinton, Mass., Monday, April 15, 2013. (AP Photo/Stew Milne)

Defending champion Shirley Reilly, left, gets her wheelchair into position prior to the start of the wheelchair division of the 117th running of the Boston Marathon, in Hopkinton, Mass., Monday, April 15, 2013. (Stew Milne/AP)

Defending champion Josh Cassidy, of Canada, adjusts his wheelchair prior to the wheelchair division start of the 117th running of the Boston Marathon, in Hopkinton, Mass., Monday, April 15, 2013. (Stew Milne/AP)

Dick Hoyt, right, and his son, Rick, stand next to a statue honoring them near the start of the 117th running of the Boston Marathon, in Hopkinton, Mass., Monday, April 15, 2013. (Stew Milne/AP)

Runners gather at the athletes village prior to the start of the 117th running of the Boston Marathon, in Hopkinton, Mass., Monday, April 15, 2013. (Sew Milne/AP)