the u.s. military dropped i think largest non-nuclear bomb targeting an isis complex in afghanistan at more than 21,000 pounds the device is nicknamed the mother of all bombs. let's go to our pentagon correspondent barbara starr. they broke the story earlier take. barbara, this is first combat use of this weapon? >> reporter: that's right, wolf. it is an important point to make. it is the largest bomb dropped in combat ever, we are told, by the united states military. it was midday in washington when this happened in eastern afghanistan, a very remote mountainous area near the pakistan border, dropped against a complex, we are told, of tunnels and caves being used by isis fighters in that area of eastern afghanistan. the u.s. had been targeting this isis group for some time. they had been moving through the area. we are told that this mission started being planned several days ago, that the commander in afghanistan had had the