Runners battle through the heat during the 2007 Chicago Marathon. | AP

A wide shot of the action during the 2007 Chicago Marathon. | AP

Race participants exit the finish area after completing the 2007 Chicago Marathon. | AP

Marathon participants spread their arms as they walk through a mist sprayed by the fire department during the 2007 Chicago Marathon. | AP

Runners pass through downtown during the 2007 Chicago Marathon. | AP

Runners make their way down State St. during the 2007 Chicago Marathon. | AP