Drone sightings closed the Nordic region’s two biggest airports for up to four hours as anxiety mounted across Europe about a series of violations of airspace by unmanned and manned aircraft.
因發現無人機，北歐地區兩大主要機場關閉長達四小時。此前歐洲多地接連發生無人駕駛與有人駕駛航空器入侵領空事件，引發廣泛擔憂。
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