"Why was a plane able to fly over New York?"

Greg Farris writes:

Utter nonsense.
It's never been "forbidden" for IFR operations to overfly Paris.
It's "always" been forbidden for VFR operations to penetrate Paris' Class "A".
None of this changed after 9/11. The only thing that changed at that time was
that the only VFR corridor anywhere near Paris (over LeBourget Airport) was
closed - probably forever.

I'm just going by what I read. I do see a lot more aircraft
overflying the city than in the past, when they were scarce.

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