Khardung La, the world’s highest motorable mountain pass at a height of 17,582 feet in India’s youngest Union Territory of Ladakh, hit the headlines for a different reason on Republic Day this year. The move by engineer-turned-innovator Sonam Wangchuk, 51, to organise a rare five-day climate fast at Khardung La, 40 km from Leh, has thrown a major challenge to …