You may have seen Bret Baier’s interview with former National Security Council spokesman Tommy Vietor on Fox News Thursday evening. The conversation dealt with the Benghazi attack, and it was combative at times. Vietor spun hard for the administration, even smugly calling Baier “dude” at one point. But Baier appeared to be well-prepared for Vietor’s spin with a wide array of relevant video clips and sound bites.

On Friday, Baier went on Mornings on the Mall, a Washington, D.C. radio program, to talk about the Vietor interview. [See YouTube video embedded below.] He explained to the hosts how he prepared so well: