Virgin Galactic crash: SpaceShipTwo probe 'may take year'

The investigation into the Virgin Galactic spacecraft crash in California's Mojave Desert could take about a year, the head of the US transport safety agency has said.

Christopher Hart said Virgin Galactic would be able conduct further test flights while the investigation took place.

SpaceShipTwo broke up in mid-air during a test flight on Friday, killing one of the two pilots on board.

Peter Bowes reports.