Age of violence? Eiffel Tower attack adds to security concerns in France

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.