Unidentified aircraft
Searches now seem to be concentrated to the west and north west of Malaysia and hijacking, by the pilot or other person they don't say, seems to be the favourite theory coming from press conferences. This seems to be based on the Malaysian Air Force radar seeing it turn but as an unidentified aircraft.
Has anyone asked what the Air Force was doing whilst this unidentified aircraft was flying towards them? Same question to countries further along the supposed track. All sitting on their hands? Why were fighters not sent up to investigate? I am sure they would have been in Europe.
Could this have been a hijacking to test the air defence systems in the area?