The US is actively engaging in offensive cyberwar. There was talk of it before, but recent leaks have made it even more clear that this is, in fact, the case. Some people would like you to believe that it is absolutely necessary for this sort of military action to take place in order to protect the National Security. Some would have you believe that in planting logic bombs on foreign systems and mapping out international networks and setting traps to destroy them, our intelligence services are simply doing what all armies have done throughout history -- gathering information and preparing for battle. It is not.
This is a wrong-headed strategy.
First and foremost, national cyber warfare services need to be focused squarely on cyber defense, not cyber offense. Not that there isn't any potential role for offense ever, I am open to the idea that there might be a very good argument for cyber offense as a way of limiting the use of other weapons, but I do NOT believe that the appropriate weapons for cyber offense are those that take down the network as a whole -- or anyone's public network.