Missing plane: Key moments in video

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.

The search

After weeks of searching, satellite images point to the likelihood of wreckage in an area of the southern Indian Ocean.

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Media captionThe remote location of the search area means a long flight before crew can begin searching the waves below.
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Media captionThe area is known as "the Roaring Forties" due to its notoriously strong winds
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Media captionRupert Wingfield-Hayes takes a tour of the Lockheed P-3 Orion as it embarks on a search for the missing plane.
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Media captionJon Donnison reports from Fremantle Port in Perth, where much of the search operation is based
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Media captionAndy Moore explains how technology has focused the search for the wreckage

The families

In Beijing and Kuala Lumpur, families of the missing have been struggling to find ways to deal with the situation.

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Media captionMalaysia's PM announced that the flight had been 'lost' - some relatives received the news by text message
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Media captionCandlelight vigils and memorial services have been held in Malaysia
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Media captionIn Beijing, there have been angry scenes outside the Malaysian embassy
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Media captionSome of the relatives have refused to believe that their loved-ones are dead
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Media captionA ''wall of hope'' in Kuala Lumpur gives people a chance to express their emotions

The theories

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.

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Media captionKrupa Padhy takes a look at some of the theories about what might have happened
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Media captionIt is believed unlikely that the disappearance was an act of terrorism
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Media captionRichard Westcott explains what we do know of what happened aboard missing plane MH370

The authorities

The search for the plane has involved many different countries. The Malaysian authorities have given daily updates on their progress.

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Media captionMalaysian PM Najib Razak: "According to this new data, flight MH370 ended in the southern Indian Ocean."
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Media captionAustralian PM Tony Abbott: "If there is anything down there, we will find it."
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Media captionMalaysia Airlines chief executive Ahmad Jauhari Yahya defends his company's response to missing flight MH370
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Media captionMalaysia's acting Transport Minister Hishammuddin Hussein says the search for the plane is "bigger than politics."

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