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It's not enough to be at the forefront. In an era when everything has supposedly been done, these adventure icons ignore convention, court risk, and let their passion lead the way.

Of course they do—they get to trek with camels. But you can, too! We’ve got the COOLEST TRIPS, TOP TEN TRENDS, EXPERT ADVICE, AND BEST NEW PLACES TO GET LOST IN 2003. So what are you waiting for? Giddyup! Star…

They fly into lands of hunger and madness, dispensing food while warlords dispense terror from the barrel of a gun. They trade safety and comfort for the sharp edge of altruism, predictable careers for the daily bread of death and disease. They're relief workers on the front lines—and once they're hooked, they can never go home again.