after, he became -- he hedged. he hedged. he suddenly, i'm not talking about that. i'm not saying that. we're not commenting on that. >> weeks after the flight vanished, richard quest put some of those questions to malaysia's then prime minister. >> what would you say to the critics, and be blunt, prime minister, who say malaysia wasted time at various parts of the investigation. >> i don't think they were fair criticism. you remember when the plane was reported lost, i was briefed that morning. and i took the decision that we must search both areas, the south china sea and the northern part. >> but no one was willing to comment either on the biggest unanswered question. did mh370 vanish because somebody with intent took over its controls? >> there is some level of human intervention. this is undoubted. >> nick huslan has piloted the