The remains of missing Malaysia Airlines flight MH370 are yet to be found, and documentary-makers have proposed a new theory as to its location – that the plane was flown off course towards Antarctica.
The Boeing 777-200ER went missing on 8 March 2014 with 239 people on board, while travelling from Kuala Lumpur to Beijing.
The search has focused on the waters off Perth, Australia, but after nearly 12 months, search teams have yet to find any debris from the wreckage.
In a National Geographic documentary due to air next month, aviation disaster expert Malcolm Brenner says that a fresh examination of the evidence revealed that the plane made three turns after its final radio call. By making these turns, Brenner argues, someone in the cockpit had deliberately flown the plane off course and towards Antarctica.
On 29 January, Malaysian authorities officially declared flight MH370 an accident with all crew and passengers on board presumed dead, opening the pathway for the families of those missing to claim compensation.
Malaysian 370: What Happened? premieres Sunday 8 March at 20:00 on National Geographic Channel