Agence France-Presse: Australians believe climate change is the biggest security challenge facing their country and are largely relaxed about the rise of China, a government report released Wednesday showed. The report, which canvassed community attitudes as part of a review of the country’s defence forces, also found that Australians were interested in friendly relations with Indonesia. The findings are in sharp contrast to a similar study conducted in the late 1990s, when Australians ranked …