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I dreamed of Iceland , perched precariously on the mid-Atlantic volcanic ridge , as an adventurer 's paradise of glaciers and salmon-filled rivers , high green cliffs and spectacular fjords . The objective is to advance our knowledge of the frontiers by bringing back new data in the safest possible manner . She 'd been " the Mitchell girl " - the responsible one , the one who had to grow up early because her parents were gone , the one teachers could count on to follow the rules and go above and beyond in the classroom , the one adults smiled at when passing on the street , the one invisible to her classmates . To collect data inside the hurricane that will tell meteorologists where the storm is going , when it will get there , and how violent it will be . That meant more and more people were crossing the deserts of Arizona , especially in the Cabeza and neighboring Organ Pipe Cactus National Monument.In 2002 the traffic through the Cabeza just exploded , Di Rosa said . In 1999 he published Dead in Their Tracks , a book about the deaths he was beginning to see in the Cabeza and nearby deserts . The men were armed with the only weapons they owned , spears , machetes , and bows and arrows , all except Manga , who was using a borrowed rifle .