9 mysterious plane disappearances in history
Updated: 2014-03-28 07:59 (People's Daily Online)2003: Mysterious disappearance of a Boeing 727 plane in Angola
A Boeing 727 with series number N844AA suddenly took off from the Quatro de Fevereiro International Airport, Angola on May 25, 2003. It took off with headlights and transponders switched off, and the air controller failed to get any response from the flight. Various theories have been put forward: the plane had been hijacked, or was to be used in a terrorist attack, or crashed somewhere. Its whereabouts remain unknown.
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