Nobody knows why we are there spilling our blood and theirs, and bankrupting our country. Defend our borders, and keep our power in the air, space and oceans as part of that defense, but out of foreign soil.
I believe Afghanistan is about keeping control of where the money flows from one of the largest commodities on the planet (OPIUM). Historically Opium is a required substance of war and is why Afghanistan has always been occupied. Of course, opium can be produced anywhere, but Afghanistan controls the market price worldwide