Averting acts of terrorism through non-traditional means of surveillance and control: the use of crowd sourcing (collective intelligence) and the development of a new class of anti-terror mobile apps. The proposed class of anti-terrorist apps is based on two dimensions: the individual and the central. By individual, we mean the individual app user and by central we mean a central organizational locus of coordination and control in the fight against terrorism. Such a central locus could be a governmental agency or a national/international security organization active in the fight against terrorism.