More Afghan treachery

Washington Post:

A man wearing an Afghan army uniform killed two NATO troops in southern Afghanistan on Monday, military officials said, the latest in a string of shootings that have undermined trust between allies. 

The gunman was killed by NATO troops shortly after he opened fire on a group of foreign troops, the military said in a statement. A military spokesman said officials were investigating whether the man was an Afghan soldier or an infiltrator wearing the uniform. No other details were released.

...

This is going to make it difficult for Obama to sustain his disengagement strategy which relies on a small number of US troops to train and support larger Afghan units.  Ce we trust them to fight the Taliban without shooting us in the back?