Benchmarks in Closure and Reopening of NAS
Tuesday, September 11
• DOT Secretary Norman Mineta, via the FAA, ordered the grounding of all aircraft in the National Airspace Syst

Tuesday, September 11
• DOT Secretary Norman Mineta, via the FAA, ordered the grounding of all aircraft in the National Airspace System effective at 9:25 a.m. EDT. At 2:07 p.m. the final civilian flight landed. Oceanic flights inbound to the continental U.S. diverted to Canada. Canada soon closed its airspace.

• Air Traffic Control System Command Center (ATCSCC) authorized the release of medical emergency, military and law-enforcement flights and assigned discrete beacon codes based on callsign, aircraft type, reason for mission, names and social security numbers of all on board, departure and arrival time, route and beacon code.

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