A former pilot has shared his theory of what really happened to the missing Malaysia Airlines flight MH370.
A total of 239 passengers and crew were aboard the Boeing 777 when it disappeared on 8 March 2014.
While governments stopped their official search for the aircraft in 2017, experts in the aviation industry continue to look for answers.
In BBC documentary Why Planes Vanish: The Hunt for MH370, Jean Luc Marchand, former air traffic manager at Eurocontrol and retired commercial pilot Captain Patrick Belly, say they are convinced the plane was steered off-course by an experienced pilot.