What happened when the Rooney Rule made its way from pro football to corporate America? Some progress, some backsliding, and a lot of controversy. (Second in a two-part series.)

The biggest sports league in history had a problem: While most of its players were Black, almost none of its head coaches were. So the N.F.L. launched a hiring policy called the Rooney Rule. In the first episode of a two-part series, we look at how the rule succeeded — until it failed.