STRASBOURG (Reuters) -Recent drone incidents and other airspace violations show Europe is facing hybrid warfare to which it must respond with measures that go beyond traditional defence, EU Commission President Ursula von der Leyen said on Wednesday. "This is not random harassment," von der Leyen said in a speech in European Parliament in Strasbourg. Von der Leyen did not say Russia was responsible for all the incidents but said it was clear Russia's aim is to "sow division" in Europe.