MH370: Searching an area '40 times the size of London'
Despite an extensive international search in the southern Indian Ocean, no trace of missing aircraft Malaysian Airlines flight MH370 has been found.
The Malaysian government officially declared the disappearance of the flight, which was en route from Kuala Lumpur to Beijing on 8 March 2014 with 239 people on board, an accident.
Since the end of June, investigators carrying out the search have been focusing on a refined area 1,800km (1,100 miles) off the west coast of Australia.
Jon Donnison looks at the huge scale of the task.
06 Mar 2015
- From the section Asia