Originally Posted by SPN Lifer
I suspect the DCA restrictions were imposed to force some (transcon) business to IAD.
That's exactly why this is in place. Similar restrictions are in place at LGA and DAL. In Denver they didn't want any chance of competition from a second airport so after it was closed *everything* except the control tower was removed (it was saved as a reminder of what once was). There are now houses on the old site.