Irakl Khvedaguridze, 81, is the only licensed doctor across 386 sq miles of mountainous region, serving a dwindling community of Tush people. During the summer and early autumn, he gets to his patients on his white horse, Bichola. When the snow gets too deep, Khvedaguridze converts his shoes into skis using birch planks nailed with wide canvas. Once the snow rises above his knees, he can only travel on foot