The legacy of Milwaukee's Socialist mayors

Public servants going into government to clean things up? Sounds cliché! But at the Jones Island Water Reclamation Facility in Milwaukee, Wisconsin, that's job number one (and number two).
As our guide Bill Graffin explains, this 101-year-old pioneering feat of engineering treats as much as 400 million gallons of wastewater each day.
So, before the treatment center was built, how was water in Milwaukee treated? "It wasn't," Graffin replied.
Opens CBS News in a new tab