Virgin Galactic completes final spaceflight before two-year pause Phys.orgVirgin Galactic spaceplane takes tourists on flight ReutersVirgin Galactic completes final VSS Unity spaceflight USA TODAYVirgin Galactic launches VSS Unity space plane on final suborbital spaceflight with crew of 6 (photos) Space.comVirgin Galactic Completes 12th Successful Spaceflight Virgin Galactic