I diverted into Gander on Christmas Eve while bringing troops home. The people at the airport were awesome to find accommodations for 250 people. Granted, there are not many fancy hotels, but the people are great and very friendly. The ice cream made from moose milk is fantastic, as well.
I wasn't there on 9/11, but you should see the pictures of all the airplanes stacked on the ramp and taxiways.