Relying almost entirely on energy from variable renewable energy sources (vRES) will require a transformation in the way power systems are planned and operated. This webinar will present the report "Power System Strategic Flexibility Roadmap". This work outlines steps for overcoming the challenges in creating power systems with the flexibility needed to maintain system security and reliability while relying primarily on variable energy resources. The work is largely a synthesis of the many reports and studies on this subject. It seeks to summarize that body of work for a less technical audience that will need to put in place the policies, technical changes, and institutional systems necessary to make the power system of the future a reality. For this work we gathered opinions from a dedicated power system flexibility advisory panel, through two meetings, e- mail exchanges, and an online survey.