The following mayors who joined the Challenge are no longer in office:

Atlanta, Ga., Mayor Shirley Franklin

Baltimore, Md., Mayor Sheila Dixon

Brockton, Mass., Mayor James Harrington

Hesperia, Calif., Mayor Mike Leonard

Meridian, Miss., Mayor John Robert Smith

Miami, Fla., Mayor Manuel Diaz

Millbrae, Calif., Mayor Gina Papan

Rexburg, Idaho, Mayor Shawn Larsen

Seattle, Wash., Mayor Greg Nickels

St. Petersburg, Fla., Mayor Rick Baker

Toledo, Ohio, Mayor Carty Finkbeiner

Tulsa, Okla, Mayor Kathy Taylor

Vancouver, Wash., Mayor Royce Pollard