Dr. Tony van Vliet is a psychologist with a particular interest in behavioural change. He has been working with TNO for more than 20 years in a host of projects in the security domain. Amongst others, these were EU projects dealing with perceptions of security CPSI, and understanding extreme radicalization SAFIRE, IMPACT EUROPE and PERICLES, and understanding terrorism TACTICS. His particular expertise lies in the unravelling of complexity of the issues at hand so that sense making is enhanced and operational actions become feasible. The main objective in all his activities is: inhibiting extreme and violent behaviour of specified actors. Within PREPARE he will be mainly engaged in the development of the proposed tool.