Missing MH370: Aviation experts air their opinions

When Malaysia Airlines flight MH370 vanished in the early hours of Saturday, it was instantly on its way to becoming one of the great riddles in modern aviation.

Some 48 hours later, experts and observers are still scratching their heads over the possible outcome of the lost airliner and the 239 people on board. As of Sunday night, 11 countries, including China, Vietnam, the US, Singapore, and the Philippines were conducting intense search operations, and still no answers.