From 2 to 12 May 2017 the Netherlands will chair the Preparatory Committee (PrepCom) for the 2020 Review Conference of the Non-Proliferation Treaty (NPT). This will not be an easy task, considering the failure to reach consensus among the NPT member states during the 2015 Review Conference. Moreover, polarisation among the NPT member states may be even more increased by the current nuclear weapons developments in the United States, Russia and North Korea and the Nuclear Ban Treaty negotiations at the United Nations in which the nuclear weapons states do not participate. What are the perspectives for nuclear arms control in these circumstances, and for the 2017 PrepCom in particular? These issues will be discussed during the seminar "Challenges in Nuclear Arms Control: The Non-Proliferation Treaty at Risk?"