Our nukes can't defend us from anyone else with nukes. So it is pointless to keep building more nukes, when the proliferation of weapons makes us less secure, and increases the likelihood of them being used in "theatre warfare" or civilian targets, like NYC or Washington DC.

All our military might, huge as it is, was powerless to stop the attacks like the WTC by Saudi kamikaze pilots because they had the one weapon LH talks about that we can't defend against: the element of surprise.