For only the third time in U.S. history, the American press is covering a presidential impeachment. On this week’s On the Media, a look at a few of the coverage missteps made along the way. And, the reporting process behind the Washington Post "Afghanistan Papers" scoop. Plus, the story of an unprecedented trove of TV news history, and the media activist who made it possible.

1. Jon Allsop [@Jon_Allsop], writer for Columbia Journalism Review, on the impeachment coverage that's been less-than-perfect. Listen.

2. Craig Whitlock [@CraigMWhitlock], investigative reporter for the Washington Post, on a once-secret internal government history of the Afghanistan War. Listen.

3. Matt Wolf, documentarian, on the life and work of the activist-archivist Marion Stokes. Listen.