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Virgin Galactic investigation 'could take a year'

The investigation into what caused the Virgin Galactic test flight to crash could take as long as 12 months, lead investigator Chris Hart has said.

Mr Hart, who is acting head of the National Transportation Safety Board, also told reporters that his team would interview injured co-pilot Peter Siebold when he was ready.

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Virgin Galactic wreckage seen in the Mojave desert

The wreckage of the Virgin Galactic SpaceShipTwo can be seen over the Mojave desert in California.

Californian authorities say one pilot has died and another has suffered a "major injury" following the test flight.

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