In just 20 days in June, the 107th Engineering regiment of the Army constructed the longest Bailey suspension bridge in the world across the river Sutlej in Wangtu, a small hamlet in Himachal Pradesh's Kinn-aur district. The 400-ft bridge, connecting the valleys of Kinnaur, Lahaul and Spiti to the rest of India, was swept away in August, last year, following flash floods after a big cloudburst. Such had been the ferocity of the cloudburst that it split a mountain, with thousands of tonnes of debris damming the Sutlej and creating a 1.1 km long lake. The breach, in a couple of hours, swept away two bridges, each measuring 250 ft. Says Major M.J. Kumar of the 107th, the officer who oversaw the construction of the new bridge: "There wasn't even a single nut or bolt left of one of the bridges. It was a 500 tonne RCC bridge. The other had just a five-foot girder left."