星期六(12月28日)，美国各地恶劣的天气扰乱了假期旅行，东南部发生致命龙卷风，西海岸则出现大雪和强风，导致全国数千架航班延误或取消。据航班追踪网站FlightAware的数据，星期六美国有超过7000个航班延误，超过200个航班被取消。

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