March 17, 2008 1:12 PM

Tibetan refugees brave perilous journey to freedom

The icy Nangpa pass is a well-worn route out of Tibet. Thousands of Tibetan Buddhists have crossed it in recent decades, part of an exodus of Tibetans escaping Chinese religious and political control. The pass is no ordinary mountain crossing. It's 18,700 feet high, higher than any peak in North America except Mount McKinley in Alaska and Mount Logan in Canada's Yukon.

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