US military is facing increasingly Anti-access /Area denial environment, a set of overlapping military capabilities and operations designed to slow the deployment of U.S. forces to a region, reduce the tempo of those forces once there, and deny the freedom of action necessary to achieve military objectives . “A2/AD capabilities …

Critical infrastructure comprises facilities and assets that are essential for the normal functioning of day-to-day life within a country and range from energy and transportation to agriculture and public health.   Extremists tend to view critical infrastructure as an attractive target to create chaos, and induce panic, fear, or terror …