It happened just a few days before Christmas. The very thing German security officials, supported in part by foreign intelligence services, had long been able to prevent: a terrorist attack, claiming many lives. Jihadist Anis Amri killed 12 people on December 19 when he drove a stolen truck into the crowds at a Christmas market in Berlin. Now, the Federal Office for the Protection of the Constitution (BfV), Gemany’s domestic security agency, has warned that it could happen again. “We continue to have a high threat level in Germany,” said BfV President Hans-Georg Maassen.