The objectives of the webinar are:To introduce an overview of the nuclear security preliminary considerations for MPEs in accordance with Section 2 of the IAEA Nuclear Security Series No. 18: Implementing Guide “Nuclear Security Systems and Measures for Major Public Events” and?practical experience in implementing these preliminary considerations. ?To discuss the challenges and opportunities in developing, implementing, and sustaining nuclear security measures for MPEs;To raise awareness on the IAEA support to its Member States in the area of MPE nuclear security.?This webinar would be of interest for those working at national policy, strategic and planning or decision-making level, senior level nuclear regulators, command level representatives of law enforcement agencies and/or military, and other organizations involved in the national nuclear security regime. The webinar is open to officials and nuclear security professionals from the above-mentioned organizations in Member States.