The bombing of Nagasaki on August 9, 1945 was the last major act of WWII and within days the Japanese surrendered. Nagasaki was a major shipbuilding city and a large military port. Fat Man was a very effective bomb. Its blast was bigger than Little Boy's but its impact was reduced by the natural topography of the city. Where the bomb blast hit at its peak, massive damage was done. In 1953, a report by the US Strategic Bombing Survey put the number of deaths at 35,000, wounded at 60,000 and 5,000 missing. The Nagasaki Prefectural Office put the figure for deaths alone at 87,000 with 70% of the city's industrial zone destroyed.