We still have absolutely no idea what has happened to flight MH370. Extraordinary for a world gripped by this story; excruciating for families just wanting to know one way or another whether their loved ones are still alive. As we know, most passengers on board Flight 370 were from China so as we saw, there is a huge appetite from the media to hear from them about what they are going through. But how much has the world heard? Tom Donkin has more.