Late last month, a helicopter and passenger airliner collided mid-air over the Potomac River in Washington DC, killing all 67 on board both aircraft. This week, a Delta Air Lines jet crashed on the runway in Toronto, catching fire and rolling upside down, though no one was killed. Between those two incidents, a commuter plane went down off the coast of Alaska, killing 10 people. Then on Wednesday a mid-air collision in Arizona left two people dead. Is aviation’s enviable safety record breaking down?
上月底，一架直升機和一架客機在華盛頓特區的波托馬克河上空相撞，機上67人全部遇難。本週，一架達美航空(Delta Air Lines)的噴射飛機在多倫多的跑道上墜毀，起火併翻轉，但無人遇難。在這兩起事件之間，一架通勤飛機在阿拉斯加州海岸附近墜毀，導致10人死亡。然後在週三，亞利桑那發生了一起空中相撞事故，導致兩人死亡。航空業令人羨慕的安全記錄是否正在崩潰？
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