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Malaysia Airlines flight MH370 has been lost in the southern Indian Ocean, the Malaysian prime minister has said. But the precise whereabouts of the plane, and the chain of events that led to it crashing into the sea, remain a mystery.
After weeks of searching, satellite images point to the likelihood of wreckage in an area of the southern Indian Ocean.
In Beijing and Kuala Lumpur, families of the missing have been struggling to find ways to deal with the situation.
What happened to the aircraft? The lack of a mayday call and the absence of the black box flight recorder has led to the emergence of numerous possible explanations of what happened on board flight MH370.
The search for the plane has involved many different countries. The Malaysian authorities have given daily updates on their progress.