BOSTON (AP) - The champion of the men's 2013 Boston Marathon returned his winner's medal to Mayor Thomas Menino on Sunday to honour the city and those killed and injured in the bombings near the finish line of one of the world's top running events.
"Sport holds the power to unify and connect people all over the world," Mr Lelisa Desisa of Ethiopia told the crowd through a translator. "Sport should never be used as a battleground."
More than 6,400 athletes gathered on Boston Common for the 10K organised by the Boston Athletic Association, the same nonprofit that handles the annual marathon. Spots for Sunday's race sold out in 13 hours online.
"Let me tell you: As mayor of this great city for the last several years, I have never seen Boston come together like it has after the attacks," Mr Menino told the crowd. "Thank you for making Boston stronger."
A moment of silence paid tribute to the three victims killed in the April 15 bombings and to Sean Collier, the Massachusetts Institute of Technology police officer who was shot and killed April 18 in a search for the suspects.
"The feeling here is a little weird," said Mr Jon Everitt, an MIT student who lives in Cambridge. He said the bombings are "definitely in the back of your head."
Ms Melissa Blasczyk, of Boston, ran the 2013 Boston Marathon and was 2.4km from the finish line when spectators began telling runners the race was over.
"Today I'm going to finish, run a strong race and take in the scenery," she said. "Obviously, (the attack) is in the back of your mind, but you just have to live your life."