Cameron imo, like Blair, was a pathological liar and I would give his views zero weight. On the EU or anything else. Most EU countries have not fought a war for over 70 years and then most capitulated. They dont have the experience or a clue what to do.
German paper Die Welt claims that the man arrested by police is of Chechen origin. The National Criminal Police Office (LKA) say that the dead passenger may have either died during the incident or may have been shot beforehand.