One month after a teacher was stabbed to death at a French high school, headteachers are being taught how to react to high-intensity violent situations. Police in the northern France region of la Somme runs a two-day safety training course designed specially for new school principals. In makeshift classrooms, they pratice going through various scenarios from angry parents storming into class to student brandishing a knive or another one trying to set themselves on fire to be prepared to defend themselves and protect their pupills. IMAGES AND SOUNDBITES