US authorities scrambled fighter jets above American cities as a precaution, but federal investigators said there was no evidence of terrorism in the crash, which happened during foggy conditions around3 pm.

• 美国当局数驾战斗机紧急起飞，在美国各城市上空以备不测，但联邦调查员称，这次坠机没有恐怖行动的迹象，飞机是下午3点左右在大雾弥漫的情况下坠毁的。