A person riding in the extra seat in the cockpit of a Horizon Air passenger jet tried to shut down the engines in midflight and had to be subdued by the two pilots. The San Francisco-bound flight on Sunday diverted to Portland, where it was met by law enforcement officers. . . . . “We’ve got the guy that tried to shut the engines down out of the cockpit. And he — doesn’t sound like he’s causing any issue in the back right now, and I think he’s subdued,” one of the pilots said on audio captured by LiveATC.com. “Other...