NBC News, a year after the loss of Malaysian Airlines flight 370, has an interesting piece about various scenarios that would explain the plane's disappearance. From the article: The theory that the pilots turned west because of an emergency is undermined because they did not head back toward Kuala Lumpur, according to retired NTSB senior investigator Greg Feith. ... Feith said that turning off the communications and taking the aircraft to the remote Indian Ocean was a course of action consistent with someone trying to purposefully lose an airliner. "It's 20,000-plus feet deep there," Feith said. "It's going be very difficult to find." He added that "the first thing you're going to do" as a pilot during an emergency is "don the oxygen mask" and "confess to ATC [air traffic control], 'We've got an issue, we need to return.'" Feith, who investigated other so-called "murder-suicide" airline crashes while at the NTSB, said that he has "always postured at least that this was an intentional act by one or both pilots."