Historians in Pueblo, eager to tell the story of Coloradoâ€™s steel industry, happened upon the mother lode a while back. They opened the door to a medical clinic that once served the CF&I steel mill. That's Colorado Fuel & Iron. What they saw amazed them: X-rays, test tubes, old medicine bottles. It was like the place had been frozen in time. Now, seven years after that discovery, the clinic has turned into a museum. Maria Sanchez-Kennedy, executive director of the Bessemer Historical Society in Pueblo, talks to Ryan Warner.