A selection of experts - Fiona Adamson, Raphael Bossong, Bahadır Kaleağası, Stefan Lehne, John O’Brennan, Marc Pierini, Gianni Riotta, Stephen Szabo, Eleonora Tafuro Ambrosetti, Nathalie Tocci, Sinan Ülgen, Pierre Vimont - comment the foreign and security policy challenges shaping Europe’s role in the world.