The man in charge of air traffic control in the United States, Hank Krakowski,
has resigned over revelations that flight controllers have been sleeping on the job.
The Federal Aviation Administration said people had rightly questioned its ability to ensure safety.
Andrew North reports from Washington.
Six times so far this year, air traffic controllers at US airports have fallen asleep on the job.
The most recent was just last week when a medical flight carrying a sick patient had to land on its own in Nevada
when the pilot couldn't get through to a snoozing controller on night duty.
Two aircraft had to land unaided last month here in Washington after the controller there nodded off.
The same person at Seattle airport is reported to have fallen asleep three times on the job before being suspended.



[参考译文]
美国负责空中交通的运营官克拉科夫斯基(Hank Krakowski)
由于领航员上班时间打瞌睡，他宣布辞职。
联邦航空局表示，人们恰当地质疑了该部门确保乘客安全的能力。
Andrew North在华盛顿报道。
今年以来，美国机场的领航员已有六次在上班时间打瞌睡。
最近的一次是在上周，搭载着一位病人的医务航班不得不自行在内华达降落。
由于飞行员不能接通值夜班期间正在打瞌睡的领航员，
上个月，在华盛顿，由于领航员打瞌睡，两架飞机在没有任何指导的情况下降落。
据报道，西雅图机场同一个人曾三次在上班时间打瞌睡，最后被停职。