Nuke their airfield-city.
Not an option as he says, it's a rush, therefore I'd guess there are no nukes available, and even then it's luck to have uranium and the range is much shorter.
I'd say that is a rather exact representation of the current world affairs at this point in time;
the US, being the only power in the world in possession of such stealth technologies, have no opponents that can stop their B-2 bomber squadrons.
To be fair, these are not available in the quantity as in the game. Also it may be possible to detect B-2 by now (passive radar, radars, that have enough CPU power to calculate plausability of bird-like objects actually being a plane, detection by satellites). Of course then it would be a secret. The best thing for a country able to detect stealth bombers would be a potential enemy that continues to invest heavily in obsolete stealth bombers.
These are pricey. Of course in Civ there is not detection. It would be nice if there were radar stations to build that could see into enemy territory and help detecting fighters/bombers/missiles. Also I want the airfields back. And while were at it, the airports that could transport units were nice, too.