Revenge. Taliban didn't want to turn over the people who attacked us so we wrecked their country for 20yr. Frankly I think we should have worked harder to get

Revenge. Taliban didn't want to turn over the people who attacked us so we wrecked their country for 20yr. Frankly I think we should have worked harder to get them to go after OBL and Al-Qaeda for us since they could go after them in ways that we cannot and that would probably have a greater deterring effect on any future people with dreams of attacking the first world.