July 26, 1999, 9 p.m. First hanging bivy, 18,450 feet, northwest face of Great Trango Tower. The western skyline resembles the jaw of a gnarled old troll: jagged, broken teeth, sharp fangs and stubby molars in a 180-degree semicircle. The moon rising behind our tower creates a blue halo around the fringes of the wall below, and its light reflects from the myriad ice ponds on Trango Glacier 4000 feet below. The bulk of the wall is dark and lifeless, save for the glow emanating from our tiny suspended shelter. The luminescence does not issue from a hanging stove or headlamp, however, but the electric-green screen of the computer in Alex's lap. Cords snake out of the machine in every direction, connecting with batteries, modems, and other gadgets. A three-foot antenna sticks through the stove vent,
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