The awful news reporting is now saying the plane flew for another 7 hours. Based on its last known location, could it have made the east coast of Africa? If the perp flew optimum altitudes and LRC, there are plenty of terrorist organizations operating in Africa that could help whomever flew it there use it as a future terror instrument. Once you get south of India and press west, there is no radar coverage. The only things down there are Diego Garcia, the Maldives, and a few other island clusters. Having flown that route many times in something a lot less fuel efficient than a 777, I believe it's plausible, if they had enough gas.