Two controllers at Tucson International tower

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TUCSON, Ariz. -- After another incident, this one in Reno, in which an air traffic controller fell asleep on the job, the FAA is requiring an additional controller on staff at every airport currently staffing just one overnight controller.

Tucson International Airport has only one air traffic controller overnight.

Transportation Secretary Ray Lahood says he's totally outraged by the incidents where the controller falls asleep and it out of communication for periods of time.