The Soviets couldn't do it; they had an armada of resistance against them including other Super Powers!
The Yankees couldn’t do it, they literally carpet bombed the country back to stone age.....what else did you want them to do other than to ethnically cleanse Afghanistan like Israel did with Palestine but something which the US never wanted to do. It literally built the infrastructure, albeit limited, from the ground up and tried to bring the Afghans to integrate into normal society. Brought up and trained their military and supported a Government for many years. If destruction had been their purpose, they could have achieved it within the first year!
We will do it, yes we will; because our own survival hinges on it. We cannot go about as if it is business as usual with daily bombings, killings and terrorism in Pakistan. Rather all this in Afghanistan than Pakistan. Let the swine enjoy their produce of their investments.