When is it terrorism? And when is it a mental health issue? France's interior minister is branding Saturday night's fatal stabbing of a German tourist near Paris's Eiffel Tower a "failure of psychiatric care". We ask about Gérald Darmanin's words and the profile of a 26-year-old suspect who had been detained before, treated before and who remained on a police radicalisation watchlist.
Times have changed since 2015, when France was the target of a wave of jihadist-inspired terror attacks. But there are constants. Whether it is pre-planned political violence or a spur-of-the-moment impulse, it does take a deranged mind to attack random strangers.
