New Air Force spy drones to monitor South China Sea, fleet of six planes to cost $7 billion

Australia will spend $7 billion on six unmanned spy planes that can stay in the air for more than a day and will be used to hunt enemy submarines and carry out surveillance flights.

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Source:  http://www.abc.net.au/news/2018-06-26/air-force-spy-drones-to-monitor-south-china-sea-will-cost-$7b/9909592