Two years since the Jan. 6 insurrection, extremist groups are fragmented, but live on As thousands of angry supporters of then-President Donald Trump swarmed the U.S. Capitol two years ago today, the scene was one of chaos. But among that crowd were members of well-known extremist groups, some of whom had been planning their moves in the insurrection for months. They included members of the paramilitary group the Oath Keepers, wearing head-to-toe body armor, whose co-conspirators waited across the Potomac with a stash of weapons. Members of the extremist street gang the Proud Boys were decked out in bright orange...