First paragraph: Within the space of a week a teenager seriously injured three people on a train in Würzburg before being shot dead by police and another shot and killed nine people in a Munich shopping centre. A Syrian man was also arrested in the city of Reutlingen after a woman died in a knife attack, and another Syrian man is dead and several injured after he set off a bomb in Ansbach. Access this article on The Conversation website: https://theconversation.com/germany-faces-one-of-its-greatest-political-challenges-since-world-war-ii-6300