ocr: Our helicopter is perched at such a dizzying angle on the high ridge ofr rock it looks as if the merest puff of wind will toss it lightly away into the valley far below us. Mark and I walk slowly away from it with a stiff, uneasy gait as if we are aching all over. Any move we make we make first with our heads before daring to move the rest of our bodies. Bill Black grins at us wickedly for being earthbound city boys.
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