They do these exercises because they want more aid. They have a psychotic dictator and starvation to contend with. But it's time for him to be held accountable and let his people rise up against him. It is KimJung Uns fault his people are starving. He is so paranoid it's costing his people their lives. They call them the stunted generation because of lack of protein in their diets those people are living on roots and weeds. Give them an even break cut off aid and they will take their country back. Unless the brain washing is to complete.