Virgin Orbit Boeing 747 takes first flight with rocket attached (photos)
The first time a Boeing 747 has ever carried a rocket in flight
Paul Allen’s passing leaves unfinished business on Stratolaunch’s space frontier (video)
Stratolaunch expects to get the plane certified for air-launch operations after 18 months to two years’ worth of flight tests
Microsoft co-founder Paul Allen dies of cancer at age 65
The Seattle billionaire disclosed earlier this month that he was receiving treatment for the disease