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PBS News Hour
Surge of 'Green on Blue' Attacks Has Great Cost for U.S.
While the U.S. withdrawal from Afghanistan is on the horizon, the death toll for foreign troops rises. Taliban fighters launched attacks on a U.S. military base and some Afghan troops turned their weapons on U.S. and NATO allies. Judy Woodruff talks to Ret. Lt. Gen. John Nagl and Johns Hopkins University's Vali Nasr for more.
