the challenge of this new enemy and more than anyone that i can think of, general mccrystal has beenab ab responsible for shapi that and adopting our primary method of defending the country, thank you for being here mr. mccrystal. >> thank you for a too kind introduction, i always thought of you as a nonfiction writer, but you're going into fiction now. >> you were the commander in our special operations in iraq and afghanistan, there has been a rapid evolution, i'm familiar from writing "black hawk down" from the way things were in the '90s. can you give us an idea of the overall strategy that's involved, we'll get to specifics maybe, but also the tactics that you've developed. >> not me, a group of people did, thanks. >> at the end of the vietnam war as american has done at the end of other wars, the special operations units that are created get gutted or disbanded entirely, there's a bias to do away with them. in the late 1970s they were really in pathetic shape and barely a shadow of what they had been. in 1980 the mission eagle hawk was launched for a rescue mission in tehran and it