I didn't catch the entire interview, but I caught this... "expert comment", I guess I should call it, on PBS's "News Hour" yesterday. Heavily paraphrased: The

I didn't catch the entire interview, but I caught this... "expert comment", I guess I should call it, on PBS's "News Hour" yesterday. Heavily paraphrased: The ceiling of the exclusion zone was 32,000 feet. The plane was flying at 33,000 feet. Pilots like to maintain significant buffers. As a pilot, I would be very uncomfortable with 1000 feet of buffer. If an incident occurs that requires manoeuvring, e.g. a mechanical incident, 1000 feet is very little room. P.S. I'm not speaking to the accuracy of the numbers cited. They are what I heard the person say.