Disasters caused by humans include aviation (flying) accidents, arson, CBRNs (where a country has a powerful weapon), civil disorder (where people riot or do crimes), power outages (where electricity is interrupted), public relations crises where a company must tell bad news, radiation accidents, disasters in space, a telecommunications outage (not being able to communicate), terrorism (where a group attacks civilians or says they will attack to gain something), and war (fighting with weapons between large groups).