A weekend is something to celebrate. For most, the end of the working week is a small freedom to be cherished. But today marks the one-year anniversary of a weekend that was desecrated not so far from here. On Friday 13 November 2015, terrorists armed with guns and suicide vests attacked bars and restaurants in Paris, as well as the Stade de France football stadium and the Bataclan concert venue. In all, 130 people were killed that night. The Bataclan endured the worst of the carnage. Concert-goers were trapped in the building with four gunmen for hours, and 89 were killed.