NATO: Man in Afghan army uniform kills service member

Kabul, Afghanistan (CNN) -- A man in an Afghan National Army uniform killed a NATO service member in southern Afghanistan, once again bringing a disturbing issue to center stage in the long Asian war -- attacks by local security forces against coalition troops.
The incident took place Tuesday when the man "turned his weapon against an International Security Assistance Force service member," an ISAF statement said.
Per policy, the alliance did not release the victim's identity or nationality.
A NATO analysis last year found 52 U.S. and allied soldiers had been killed in "green on blue" attacks between 2005 and June of 2011.
And while the numbers raise fears that the Taliban are infiltrating the Afghan National Army and police force, military analysts and intelligence officials say the reality is more complicated.
The analysis concludes that combat stress provoked 36% of the attacks, even if the Taliban subsequently claimed responsibility.