>> this is the level where all of these combat doctrines, how you fight a fute war, would have been developed. early 1990s is a very significant point. >> combat is changing. the cold war is over. a new stateless enemy is emerging. prior to flynn's arrival at fort polk, al qaeda sets off a truck bomb in the underground garage of the world trade center. flynn, mccrystal and petraeus recognize the new threat. >> mccrystal in special operations, petraeus in the senior staff and flynn in intelligence, these are guys who can talk about their strategy and then bring them right out into the field and...