Maybe this is where the wall should be built

NPR notes:

Thousands more troops and billions more dollars are needed to break the war in Afghanistan out of a "stalemate," the top U.S. commander in Afghanistan warned Congress on Thursday.
Army Gen. John Nicholson also told the Senate Armed Services Committee that outside powers have increased their meddling in Afghanistan over the past year, especially Russia, in ways that make it tougher for the U.S.-backed government in Kabul to make and keep gains against insurgents.
That's why the U.S. and its allies must send more troops and spend more money to help the Afghan military become more effective at attacking and defeating its enemies and keeping control of the ground they capture.

What a neverending mess.