Originally Posted by
mabuhay_2000
Somebody, somewhere, knows a lot more than they are letting on for public consumption and I'd wager that various nations and agencies are not sharing what they know with the others involved.
A large object, such as a B777 cannot simply disappear without somebody having some knowledge of its last known whereabouts. Failure to plot it on military radar seems highly unlikely. Failure to share that information seems rather more likely. In a busy shipping area it also seems highly unlikely that somebody wouldn't have seen something.
It seems highly unlikely that it could have evaded detection and landed somewhere after a highjacking. First, it would need a considerable runway to accommodate it and, second, it would have had to overfly a hefty chunk of land and somebody would most likely have seen something.
All you're missing is a plausible reason why they would keep it a secret. That's a pretty serious hole in the theory. The players who would have the radar track on Air Defense radar, but are keeping it secret would be: Vietnam, Malaysia, Cambodia, tenuously, Thailand, even less plausibly, Indonesia.
Pick any one of those. Assume that they have radar track data which indicates where the airplane went. What *possible* reason would they have for keeping it secret?