Breaking the Gender Barrier May Be New for Space Tourism--But Not for NASA Missions / Space tourists complete first-ever flight around Earth's poles / Space tourism is establishing a new frontier in travel / The next frontier? Why space tourism might not be as far-fetched as you think / Will space tourism really lift off? / How SpaceShipOne's historic launch 20 years ago paved the way for a new space tourism era / Human bodies mostly recover from space, tourist mission shows / 'Space Rescue Service' needed for coming space tourism era, report argues