Flight MH370 was diverted and or hijacked and landed in Diego Garcia (an isolated US military base south of India). The 20 scientists from US tech company were going to sell tech some valuable tech to China, so the theory goes. I'm quite certain it was a staged black op.
There's a whole lot of supporting evidence from a website I don't recall. There was also an exact model and make of aircraft (with the Malaysian airlines logo) photographed in a hanger in Israel somewhere. Probably a Mossad/CIA op.