Part 1: Nuclear Security and Proliferation -- GAO: Two Decades Evaluating the Impact and Effectiveness of U.S. Nuclear and Radiological Material Security Programs -- Neutralizing Radicalized Threat Networks, Disrupting WMD Illicit Traffickers and Targeting Corrupt Facilitators -- To Pursue an Independent Nuclear Deterrent or Not? Japan's and South Korea's Nuclear Decision Making Models -- Overview of the Cooperative Projects Implemented by the European Commission Joint Research Centre in the Nuclear Security Area Outside Europe -- Proliferation Resistance and Physical Protection (Pr&Pp) Evaluation Methodology and Applications -- Next Generation Nuclear Security Policy: Education, Research, and Experience -- The Management of Radioactive Waste in France - What is the Threat? -- Part 2: Combating Nuclear Terrorism -- NATO Nuclear Policy, the Ukraine Crisis, and the Wales Summit -- Risk Informing Security at the US Nuclear Regulatory Commission -- Sck Cen's Activities in the Field of CBRN Risk Mitigation: Practical Contributions to Improving Nuclear Security Governance -- EU Efforts in Managing CBRN Terror Attacks -- A Holistic Approach to Radiological Terrorism -- The Strategic Impact of an Iranian Nuclear Weapons Capability on Israel -- Nuclear Security Regulation in the United States: An Overview of U.S. NRC Functions and Activities -- Current Activities of the European Union in Fighting CBRN Terrorism Worldwide -- Will the Implementation of Small Modular Reactors Affect our Response Protocols to Nuclear and Radiological Threats? -- Part 3: Advanced Technologies for Nuclear Safety & Security -- Advanced Concepts in Multi-Dimensional Radiation Detection and Imaging -- Dynamics of International Nuclear Safety Post-Fukushima Developments in Regulatory Oversight and Filtered Vent Technology for Six Nuclear Countries -- The Value of Standards for Detection of Radioactive Materials -- Novel Nuclear Measurements Technologies for Safety & Security- Cosmic Ray Generated Charged Particles for Cargo Inspection -- Part 4: Nuclear and Radiological Preparedness -- Lawrence Livermore National Laboratory's Contribution to U.S. Preparedness for Nuclear and Radiological Threats -- The Emerging Threat Environment and the Impact on Nuclear Preparedness -- Cross-Border Cooperation: A Key towards Better Preparedness for Nuclear and Radiological Threats -- Challenges in National Nuclear Threat Reduction Field-Regional Puzzle.