Ioannis (John) M. Nomikos delivered a speech on “Counter Terrorism Challenges in Greece: Threats from Human Trafficking, Migration and Radicalization”, in the security and crisis management international conference – ATHENA 2018 – Turning risk into opportunity: An efficient crisis management”, organized by the Hellenic National Defense General Staff, Ministry of Defense, on 13-15 November 2018 in the Dekelia Air Base, Athens, Greece.