I understand your concern but as far as Al Queda training camps in Afghanistan we can control that without 100,000 plus troops. We have satellites that can see a gnat on a blade of grass. They can spot training camps and then we send in a couple of hellfire missiles and poof no more terror camp.
You are not going to wipe out the Taliban. They are the indegenous people of Afghanistan. Its up to the Afgahnistani’s to decide whether to get rid of them or not. Alexander the Great could not conquer Afghanistan and neither will we. They are not going to come to the US and blow up malls.
The US cannot be continually entangled in 3-4 wars in the Mideast. First of all we cannot afford it and we have no right to invade soveriegn countries that have not attacked us. This business in Libya is beyond the pale. You can’t fight the whole world.
Being involved in all of these current misadventures is not keeping us safe. There is a southern border between Mexico and the USA that is wide open. Any Al Queda terrorists that want to come into the US and pull off another 911 are free to come at any time across that border. Frankly I’m shocked that they have not already done it. We would be a lot better served to stick 20,000 troops on the Mexican border and the Canadian border as far as that goes.