by Lawcomic
This is actually an interesting question.I ASSUME you would simply improve it to 5.
However, go over to the Netrunner boards. Using the logic applied over there (based on the company's rulings), Defcon would be unaffected as it can't improve by 2. And, technically, that's probably the right answer.
But I don't think that's the right answer.
I hope that made sense.