“While North Korea apparently lacks such [high-level] drone capabilities, it potentially could fly several dozen armed drones into the ROK Presidential Office or National Assembly or an oil refinery, causing serious damage. North Korea could also use drones to carry chemical and biological weapons. Only small amounts of biological weapons are required to cause a major disaster in the ROK. For example, the release of 1 to 2 kilograms of anthrax along the route the one drone took into northern Seoul could kill tens of thousands of people or far more and create a major medical crisis in the ROK.”