Hours before President Trump attends a NATO Summit in Brussels, we examine the role of the alliance and how it fits into Europe’s recent struggles. Brexit, terrorism, a new anti-establishment government in Italy, and rising nationalism fueled in part by a flood of immigrants from the Syrian war are testing the grand European experiment. How should the continent move forward? And how will the region handle Trump’s anti-European and anti-NATO rhetoric? The Aspen Institute’s Elliot Gerson leads a conversation with Kati Marton, journalist and human rights advocate; Douglas Lute, former US ambassador to NATO; and Mircea Dan Geoana, former president of the Romanian Senate and founder of Aspen Romania.