If it does turn out to be an attack, the perpetrator must be extremely well endowed in the gonad department. Although you can never be sure with government webs

If it does turn out to be an attack, the perpetrator must be extremely well endowed in the gonad department. Although you can never be sure with government websites, you'd expect that the NSA's servers would be fairly well hardened. So successfully defeating them seems to imply someone who will understand that they're poking a nest of the smartest and most well-connected hornets in the world.