Out of this World

Some frequent fliers blow all their air miles on one big, exotic trip. Now they can start saving points toward the biggest trip of them all: a flight to space. Arlington, Virginia-based Space Adventures is now offering suborbital flightsthat's just beyond our atmosphere, 100 km above the earthfrom 2008 for those who have racked up 20 million points with American Express, or 10 million air miles with U.S. Airways. That's equivalent to 400 times around the globe. Until then, for 275,000 air miles and $8,000, would-be space adventurers can take a flight on a MiG-25 jet fighter, which gets you 25...