The photographs stop you in your tracks. Five children and their grandmother sheltering under an old wooden jetty as the air around them burns a fierce orange. Seen around the world, these were the images from the heart of the inferno that showed the Tasmanian township of Dunalley fighting for survival. On the morning of 4 January 2013, the people of Dunalley had watched with caution as a bush fire burned slowly on top of the hill. It was not an unusual occurrence - fires are a part of Australian life - and Dunalley had never been troubled before.