BBC News - Virgin Galactic crash: Descent system 'deployed early'
...Christopher Hart, NTSB: "A couple of seconds after the move from lock to unlock, all the data stopped"
Did 'feathering device' cause crash? Watch
Unique 'feathering' system
US official explains early findings Watch
A safety device on the Virgin Galactic spacecraft that crashed on Friday, killing a test pilot, had been deployed early, US investigators have said.