I'd also like to put it in a good word for the guided missile. While obviously not as lethal as its nuclear counterpart, the guided missile is very useful in certain situations. The ones which I find most obvious are those involving naval combat. For example, a nuclear sub loaded up with guided missiles becomes a very powerful anti-naval strike craft, and a missile cruiser so loaded becomes the most powerful capital ship in the game, carrier with aircraft possibly excluded. Guided missiles also serve as a way for a city to strike at approaching ranged units before they can attack the city, giving the city's other defensive units time to kill the rest of the attackers.