when america was here. we did operations. we were using ieds. the americans had their helicopters, weapons and tanks on the ground. resisted very well. >> reporter: now they roam through what's left of the tactical operation center. anything of value will be stripped down and sold. walking through what's left of these american bases, you have to ask yourself, what was it all for? america's great experience with natio nation-building, now vanishing into dust. >> it's our belief that islamic law will not come to just afghanistan but all over the world. we are not in a hurry. we believe it will come one day. jihad will not end until the last day. >> reporter: it's a chilling admission from a group that claims it wants peace.