>>> now to australia where malcolm turnbull has said there has never been a more exciting time to be australian after ousting tony abbott. he becomes the fifth prime minister in just over five years after a series of leadership challenges within both major parties. andrew thomas reports. >> reporter: in australia it is become a familiar site, a new prime minister being sworn in. >> i malcolm turnbull to swear i will serve the people of australia. >> reporter: he says his government will put forward a positive vision for the future. >> has never been a more exciting time to be alive than today. and there has never been a more exciting time to be an australian. >> reporter: australia has had a turbulent recent political past. the outgoing prime minister this time said he had much to be