Following a string of insider attacks by Afghan soldiers against their U.S. and NATO counterparts, Gen. John R. Allen, the top commander in Afghanistan, issued a new set of limits on direct cooperation with Afghan forces.
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But in reality, the persistence of Afghan troops attacking their American mentors has prompted a major shift in how the U.S. trains Afghans, to the point where it calls into question the cornerstone of the U.S. exit strategy.