A stunning achievement in location cinematography. French writer-director Eric Valli's mile-high adventure is so awe-inspiringly beautiful, you might not notice that the story and its characters are nearly as thin as the Himalayan air. Set in the northwestern Nepalese region of the Himalayas, the film offers a fascinating look at the Dolpopa, a tribal people whose survival depends on the yak caravans that carry salt they collect from the lake beds in the north to the southern lowlands, where it's exchanged for grain. The treks are long and, depending on the weather and the route chosen, often very dangerous. As the film opens, a caravan led by young Karma (Gurgon Kya...