Planning for response to terrorism

Police, fire, and emergency medical response organizations have obvious roles. Local firefighters and emergency medical personnel (often called "first responders") have plans for mitigating the effects of terrorist attacks, although police may deal with threats of such attacks.
Target-hardening

Whatever the target of terrorists, there are multiple ways of hardening the targets to prevent the terrorists from hitting their mark, or reducing the damage of attacks. One method is to place Jersey barrier or other sturdy obstacles outside tall or politically sensitive buildings to prevent car and truck bombing.

Aircraft cockpits are kept locked during flights, and have reinforced doors, which only the pilots in the cabin are capable of opening. Englishtrain stations removed their waste bins in response to the Provisional IRA threat, as convenient locations for depositing bombs.

Scottish stations removed theirs after the 7th of July bombing of London as a precautionary measure. The Massachusetts Bay Transportation Authority purchased bomb-resistant barriers after the September 11 terrorist attacks.

A more sophisticated target-hardening approach must consider industrial and other critical industrial infrastructure that could be attacked. Terrorists need not import chemical weapons if they can cause a major industrial accident such as the Bhopal disaster or the Halifax explosion. Industrial chemicals in manufacturing, shipping, and storage need greater protection, and some efforts are in progress. To put this risk into perspective, the first major lethal chemical attack in WWI used 160 tons of chlorine. Industrial shipments of chlorine, widely used in water purification and the chemical industry, travel in 90 or 55 ton tank cars.

To give one more example, the North American electrical grid has already demonstrated, in the Northeast Blackout of 2003, its vulnerability to natural disasters coupled with inadequate, possibly insecure, SCADA (supervisory control and data acquisition) networks. Part of the vulnerability is due to deregulation leading to much more interconnection in a grid designed for only occasional power-selling between utilities. A very few terrorists, attacking key power facilities when one or more engineers have infiltrated the power control centers, could wreak havoc.

Equipping likely targets with containers (i.e., bags) of pig lard has been utilized to discourage attacks by Islamist suicide bombers. The technique was apparently used on a limited scale by British authorities in the 1940s. The approach stems from the idea that Muslims perpetrating the attack would not want to be "soiled" by the lard in the moment prior to dying. The idea has been suggested more recently as a deterrent to suicide bombings in Israel. However, the actual effectiveness of this tactic is probably limited as it is possible that a sympathetic Islamic scholar could issue a fatwa proclaiming that a suicide bomber would not be polluted by the swine products.