Germany’s Defence Minister Boris Pistorius arrived in Alaska on Sunday ahead of a NATO summit in Washington to learn about the progress of Arctic Defender, a German-led multinational military exercise. Arctic Defender involves fighter pilots from several countries training in Alaska alongside the US to practice air warfare operations to NATO standards. The exercise scenario assumes an attack on allied territory, which would trigger a response from the Western defence alliance under Article 5 of the NATO treaty. According to Article 5 of the NATO founding treaty, an attack on one member of the …