With a crisis at Europe's borders as it tries to control the influx of refugees and to prevent extremist attacks, how can Europe protect itself without betraying its values? Lyse Doucet chairs a debate at the World Economic Forum in Davos with a panel that includes the German defence minister Ursula von der Leyen, the International Rescue Committee president and CEO David Miliband and the French economy and industry minister Emmanuel Macron. Show less