According to the Independent of the UK, one theory was that MH 380 may have flown under radar to Taliban-controlled bases on the border of Afghanisthan and North West Pakistan.
Sounds plausible. But what does flying under the radar mean?
"For a commercial plane to pass undetected through these regions, which are highly militarised with robust air defence networks, many run by the US military, would require a combination of extremely sophisticated navigation, brazen audacity and security failure by those monitoring international airspace."
The mystery deepens!