In this case, of airports. No, that most of them are in danger of fading away (although a few have, as we've discussed previously), but that their airline tenants might choose to de-emphasize this location, or, even worse, to pull out entirely. Years ago, I visited the airport at Glens Falls, New York. Once served by Eastern Airlines, and later, Mohawk, by the early 1970s it was bereft of scheduled airline service.