I'm fighting a war in the nuclear age for the very first time, and I can't help but wonder: is there any defense against nukes? Or should I just give up on maintaining a large air force? (a single nuke seems to take out all 10 of my garrisoned planes in one go.) I should add that I took out a stupid number of his units the turn before, so it's only fair that he gets to do the same to me now. But.... is there a way for either of us to defend?