craft and missiles protecting seoul. translator: when north korea fires its long range artillery, we can analyze the trajectory and calculate the point of origin within a short time. that data is linked to our artillery with multiple launcher targets. they worry tens of thousands of potential shells could carry a deadly passenger. translator: what s scarier is north korea is storing 5,000 tons of chemical weapons, they are also thought to have biological weapons like anthrax. long range artillery can be used as a delivery method for these weapons of mass destruction. reporter: he says it s up to him and the troops to deliver a silencing counterpunch. failure could turn seoul into