“…Artificial disasters are characterized by the presence of man: some typical examples are pollution, means of transport, accidents in energy plants (e.g., nuclear, coal, gas). Finally, the homeland security class is a particular class of emergencies where the security of a nation can be endangered (Wu, Zhu, & Rao, 2009): some typical examples are terrorist raids, wars, as well as border surveillance in particular zones, or the security of some specific areas of national interest (e.g., industrial or tourist sites) and critical infrastructures.…”