Half marathon rocks, rolls through hot, humid Chicago

CHICAGO (WLS) -- The hot and humid weather did not stop some 20,000 people from running in the Rock N' Roll Chicago Half Marathon Sunday morning.

This was the seventh year for the race on the streets of downtown Chicago. There were bands along the route and concert at the end in Grant Park.

The race is part of the Rock N' Roll Marathon series with races across the country and around the world.