A selection of experts - Cornelius Adebahr, Rosa Balfour, Kris Bledowski, Steven Blockmans, Fraser Cameron, Thanos Dokos, Björn Fägersten, Kristina Kausch, Denis MacShane, Artis Pabriks, Marc Pierini, Gianni Riotta, Daniela Schwarzer, Luis Simón, Constanze Stelzenmüller, Nathalie Tocci, Ben Tonra, Pierre Vimont - comment the foreign and security policy challenges shaping Europe’s role in the world.