US warplanes have flown over the disputed South China Sea, the US Air Force said Friday, a move aimed at asserting freedom of navigation rights in the hotly-contested area. The flights come as both US President Donald Trump and Chinese President Xi Jinping attend the G-20 meeting in Hamburg. A US B1-B bomber and two F-15 fighters with the Japan Air Self-Defense Force departed Guam's Andersen Air Force Base and flew over the neighbouring East China Sea late on Thursday, the US Pacific Air Forces Public Affairs office said.



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