A commercial airliner whisks 283 passengers from Amsterdam to Kuala Lumpur on a flight path that will take them over a conflict zone in eastern Ukraine. Mid-flight, the aircraft suddenly breaks up and crashes to Earth, killing all aboard. Signs point to a surface-to-air missile strike, but with the wreckage resting in the heart of a war zone, finding evidence proves challenging. See how investigators, against all odds, were able to literally piece together the story of what caused the 2014 crash of Malaysia Airlines Flight MH17.