Chicago Public Radio just broadcast an amazing documentary about the old Zenith manufacturing plant, which closed 10 years ago. They interviewed several former employees and intercut them in a really compelling, evocative way. I was transported to another time and place as I listened. Somehow, I managed to keep enough attention on the road to get home safely. You’ve got to hear this, because it’s not just people talking about where they used to work. They’re talking about who they used to be, and what this country used to do. Today marks the 10th anniversary of a historic plant closure…