“Major airlines, corporate jets, crop dusters, even aircraft involved in skydiving are back in service. But 10 days after the terrorist attacks in New York and Washington [September 21, 2001], many flight training schools are still closed for business. The Federal government has prohibited most flight training exercises, effectively grounding operations at more than 1,500 flight schools around the country. The government lifted some of those restrictions late last night. …The Federal Aviation Administration lifted the ban on all flight training late last night, but said that many restrictions remained. For instance, flight training in major metropolitan areas, particularly around Chicago, Boston, Washington and New York, is still prohibited.”
– David Barboza, “Government Lifts Its Ban on Some Flight Training,” The New York Times, Sep. 22, 2001