New York CNN —The Federal Aviation Administration plans to dramatically accelerate replacing the safety system whose failure led to a nationwide air travel grounding earlier this month. The 30-year-old NOTAM, or Notice to Air Missions, system provides potential flight hazard information to pilots and air traffic controllers. The FAA said it now requires “at least two individuals to be present during the maintenance” of the NOTAM system. Still, it’s another critical tool for air safety. It was the first nationwide grounding of the nation’s air traffic system in 20 years, since the days following the September 11 attacks.

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