By man in Afghan Army uniform.

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2 NATO Troops Killed

The small number of southern Pashtuns in the Afghan Army reflects an abiding fear of the Taliban, or sympathy for them, and doubts about the government.

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Afghanistan Army Tries to Attract Southern Pashtuns

In Zabul Province, the Afghan Army and the police are emerging as authorities acceptable to local people, providing a glimpse of a secure future.

The rest is here:
A Slice of Afghanistan Well Secured by Afghans