Terrorist activity involves any of the following: * Hijacking or sabotaging any conveyance, including aircraft, vessels and vehicles. * Taking and threatening to kill or injure hostages and making demands to the government as a condition for their release. * Violently attacking an internationally protected person, such as foreign representatives, consular officials, dignitaries or heads of state. * Using biological or chemical agents, nuclear weapons, explosives, firearms or other dangerous weapons to endanger individuals or to cause substantial damage to property. * Threatening, attempting or conspiring to do any of the above-mentioned activities.