breaking news. the underwater search area for flight 370 is moving north if the plane is not found this weekend. and the investigation into what caused the plane to go down is also cold. in an exclusive interview with our richard quest, the prime minister of malaysia weighed in on what he thinks caused the plane to go down. you ve given two statements, one i think on the 14th or 15th. one on the 24th. they are major statements of the direction of this. when you describe it as deliberate action by somebody on the plane, that word deliberate is very carefully chosen. and it doesn t tell us whether it s deliberate me fairious or deliberate because of mechanical, does it? and you deliberately didn t want to say that. precisely. it was very, very carefully chosen. because given the facts, and mind you, richard, the cardinal rule that we used from day one