The out-of-control airline pilot who tried to down an Alaskan Airlines flight midair told cops he had taken magic mushrooms before the flight, it emerged Tuesday. Joseph Emerson, 44, an off-duty commercial airline pilot, went off the rails while sitting in the cockpit jump seat of a flight between Everett, Washington, and San Francisco on Sunday — trying to cut the fuel to the engines before he had to be held down by crew members. Even while restrained, Emerson tried to open the emergency doors on the Alaskan flight, which was being operated by Horizon Air, as the pilots frantically...