A mosque massacre is livestreamed

Yesterday, in New Zealand, an Australian man in his late twenties logged on Twitter and 8chan, an online message board, to post photos of ammunition and a far-right manifesto. He also linked to a Facebook page, where he promised that he would livestream an impending mass shooting. The man then relayed video, lasting 17 minutes, as he entered a mosque and opened fire. It was one of two simultaneous mosque attacks in Christchurch, a city on the east coast of New Zealand’s south island. The...