BBC: Australian Prime Minister Kevin Rudd has called an election for 7 September, six weeks after defeating former PM Julia Gillard in a Labor party vote. The date was announced after he visited the governor-general, a formality preceding an election announcement. The head of the centre-left party faces stiff competition from conservative opposition leader Tony Abbott, who is favourite to win. The economy, asylum seekers and climate change are among the key issues. "It's on. A few moments ago I saw...