It is not NATO that is going to fall. It is Afganistan that is going over the cliff. Even when Taliban, with blessing of Pakistan and nod and wink of west, had taken over Kabul, rest of Afganistan was fighting them with whatever they could muster. Now it is going to be far more difficult for Taliban to take over "whole" of Afganistan. And Whatever they will take over will experience the same good Islamic governance that they conducted in first time. And next domino for them is heartland of Pakistan; not Iran, not Uzbekistan, not Kashmir. Wish you all the best.