A US man who opened fired in a Washington DC pizza restaurant because of an online conspiracy theory has been sentenced to four years in prison. Edgar Maddison Welch, 28, burst into Comet Ping Pong on 4 December 2016 armed with a rifle and pistol. He drove from North Carolina to pursue bogus claims that the restaurant was the nexus of a child sex ring linked to Hillary Clinton's inner circle. No one was injured in what prosecutors described as an "armed invasion". Welch fired an assault rifle into a locked cabinet, believing that abused children were being kept there....