This graphic chart might help illustrate why we went in and why we're still there.
Per the White House web site, Afghanistan is still producing bumper crops every year. See: Poppy Cultivation and Potential Opium Production in Afghanistan
Let me think on this a tad. Did we not use something called Agent Orange in Vietnam. Why yes we did. Has not someone thought of wiping out that crop by now. I am sure they did. So, what the hell is stopping them.
In 2001 when the Taliban killed anyone growing poppies, the value of their warehouses opium increased 4x.
So send the DEA.
We need to leave.