FILE - This is a May 19, 2017 file photo of National Air Traffic Services personnel giving a demonstration in the operations room at National Air Traffic Services in Swanwick southern England. Britain is poised to handle a record number of flights in its increasingly crowded skies. The NATS air traffic control agency said it expects to handle some 8,800 flights Friday, in what is expected to be the peak day of the busy summer travel season. (Andrew Matthews/PA File via AP)
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