Daan Weggemans is a researcher at the Centre for Terrorism & Counterterrorism of Leiden Unviersity/Campus The Hague and a research fellow at the International Centre for Counter-Terrorism (ICCT). In his research, Daan Weggemans focusses on processes of (de)radicalisation and re-integration. He studied, among others, the radicalisation and preparatory processes of Dutch Foreign Fighters. Currently he is researching re-integration of (former) extremist detainees. For his projects Daan interviewed dozens of security professionals and multiple (former) violent extremists and their peers. Earlier publications also focused on new counter-terrorism measures and, with his colleagues, on an in-depth study of the Anders Breivik trial in Oslo.