U.S. marathoner Meb Keflezighi was motivated by a slight.

Before the Olympic race Sunday, a few of the runners were introduced, but not Keflezighi. He took that as an insult since he won a silver medal in Athens eight years ago. "To not be introduced like that, it hurts," he says.

Keflezighi, of Mammoth Lakes, Calif., took his frustration out on the course as he finished fourth, more than 3 minutes behind Stephen Kiprotich of Uganda.

"Everybody works hard to accomplish such a thing and I am very proud of myself and our country to finish fourth," he said. "It's not where you want to be sometimes, but fourth place at my last Olympics? I'll take it anytime."

At least he was able to finish. Ryan Hall (right hamstring) and Abdi Abdirahman (right knee) dropped out of the marathon around the 11-mile mark.

"Not finishing a race is not an option unless I think I'm going to do serious damage to my career," Hall says. "My stride was getting worse and worse ... This wasn't something I could work through."

— Pat Graham — Twitter http://www.twitter.com/pgraham34

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EDITOR'S NOTE — "Eyes on London" shows you the Olympics through the eyes of Associated Press journalists across the 2012 Olympic city and around the world. Follow them on Twitter where available with the handles listed after each item.