A quick thought: If Malaysia flight #370 did not crash, but was intentionally overtaken – with or without the pilots\’ involvement (with evidence strongly suggesting – but not conclusive – that they were),
and the intent is to use that plane for an attack of some kind,
and the pilots, being knowledgeable about these things, realize that the world will be looking for the plane,
and every day the area to look will narrow, thus making it more likely it will be found…
…then they know the plane has to be used for that purpose very quickly – probably within the next week or two.
Again, if the plane crashed this is all academic.
But if it did not, please join me in rooting for my being wrong about this.