I don't really have a good link for this, but I recently passed through Gander, Newfoundland, Canada, an icy, small, and isolated airport that took in several dozen aircraft that were forced to land in the wake of the attacks and the need to clear and secure US airspace. The citizens of Gander took over 6000 people into their homes and fed them until flights were available again. It was just a surreal experience to be there.
Again, I don't have a link, but Joe Rogan had a guest on who stated that they never want another 9/11, but they would give anything to have the America we had on 9/12.
Feel free to contribute or ignore.
Honestly, in pretty much any small, remote place that doesn't see many new people, people will take an interest in you/be there in a time of crisis and stuff, simply because they don't see many newcomers. Same reason people are said to have been friendlier in the past - almost anywhere that wasn't a "city" was "small and remote", with not many new people moving in and out all the time. Also, Gander is home to an armed forces air base, so, military families, as well as the generally bored locals.
I've lived in a lot of places more or less like that, only in the (North)-West. New faces mean new stories to tell one another, for years and years until something new happens.
I recently read this post of the dancing israelis who supposedly planned ahead to watch and celebrated the towers falling. I don't know the full veracity of it, but the CIA investigated it and recently released info due to FOIA request.