At 5,200m above sea level, two women sit at a stone table. Mountains pierce the horizon in all directions. An imposing glacier covers the top of Huayna Potosí, a peak that stands at 6,088m. Its white surface, with a narrow footpath traversing it, gleams under the low afternoon sun.
Cecilia Llusco is sitting eating crackers with caramel spread and drinking coca tea.
