RIO DE JANEIRO, BRAZIL - (AFP) Bernardo Guarachi's eyes light up when he remembers the glorious days of Chacaltaya. At 68 years old and having climbed the world's highest peaks, this Bolivian mountaineer contemplates the ruins of what was once the world's highest ski slope - until it ran out of ice.
"Today it's a cemetery," says Guarachi, copper-skinned and jet-haired, as he frowns in the scorching sun.
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He glances up the 400-meter ramp . . .