Sabotage means deliberate damage, with malevolent intent, to a category 1 or category 2 quantity of radioactive material, a device that contains a category 1 or category 2 quantity of radioactive material, or the components of the security system.
Riot means a tumultuous disturbance of the public peace by three or more persons assembled together and acting with a common intent.
Epidemic means a sudden development and rapid spreading of a contagious disease or illness in an area as documented by a recognized public health authority.
War means war, whether declared or not, or any warlike activities, including use of military force by any sovereign nation to achieve economic, geographic, nationalistic, political, racial, religious or other ends.
Landslide means episodic down slope movement of a mass of soil or rock that includes, but is not limited to, rock falls, slumps, mudflows, and earth flows.