As NATO leaders and experts gather for the Vilnius Summit, we consider the rapid changes to Europe’s security environment. Russia’s war against Ukraine has undoubtedly transformed European security forever, but these developments are taking place in the context of wider regional shifts. While NATO and the EU are being strengthened, the continent is also seeing growing sub-regional security and defence cooperation, minilateralism and efforts at strategic autonomy. Host Neil Melvin is joined by Ivo Daalder, President of the Chicago Council on Global Affairs and former US Ambassador to NATO, to discuss how the US views Europe’s changing security and defence environment. What role will Washington seek to play in shaping the continent’s future security arrangements?