As far back as stories go, pioneers have reached for the skies. In the last two hundred years, they have mastered the air and made the modern world possible. Today they are bringing outer space within our reach. They're inventors and toymakers, amateurs and adventurers, visionaries, dreamers and, yes, crackpots. Some have called them irresponsible, even dangerous. But Richard Branson has met many of them. He has worked with them, funded them, and flown with them. He admires them, and trusts them