Donald Rumsfeld retired on Friday...after 6 years running the Pentagon. Cal Thomas has an exit interview with some interesting sound bites. How about this one: Rumsfeld regrets using the phrase "war on terror." He says that was a mistake. Yeah…I couldn’t agree more. It should have been called what it is WWIV. What happened to WWIII you ask? Well that was the “Cold War” Don't miss this one. Here's a full transcript of Thomas' interview with the secretary of defense.