AP; iStock; Skye Gould/Business Insider Malaysian Airlines Flight MH370 mysteriously vanished on March 8, 2014. William Langewiesche in The Atlantic’s July 2019 cover story unearthed new evidence that points to "the most horrific theory" on why the plane disappeared. The report suggests that Zaharie Ahmad Shah, the captain on Malaysian Airlines Flight MH370, was mentally unstable. […]