Pilot who is hospitalized parachuted to the ground . NASA 's administrator says loss of pilot felt by all who lost pilot to exploration . Both pilots worked for Virgin Atlantic 's partner , Scaled Aviation . Several celebrities have already signed up , including Justin Bieber , Ashton Kutcher , Leonardo DiCaprio and Stephen Hawking . One pilot died , and one is seriously injured , officials say .
Pilot who is hospitalized parachuted to the ground . NASA 's administrator says loss of pilot felt by all who lost pilot to exploration . Both pilots worked for Virgin Atlantic 's partner , Scaled Aviation . One pilot died , and one is seriously injured , officials say .