All that divides poverty from promise is a ramshackle barbed-wire fence. Unlike the steel barricades that mark the border between the United States and Mexico in southern California and along the Rio Grande, the barrier in the Arizona desert looks much like the enclosure of any southwestern ranch. For the throngs of illegal immigrants who attempt to cross the border in this region every year, hopping over the fence is the easy part. The difficulty comes in surviving the desert.
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