The war in Afghanistan has been a heavy burden to the United States.Over the past 10 years,the U.S.has spent nearly US$400 billion in Afghanistan,that's an average daily cost of US$100 million.More than 1,800 U.S.soldiers have been killed in Afghanistan and about 15,000 wounded.U.S.large-scale military operations in Afghanistan have achieved little,while their future withdrawal is inevitable. After the U.S.accelerated its withdrawal process from Afghanistan,Pakistan began to play an increasingly important role in bringing stability to Afghanistan and assisting in its reconstruction.Moreover,Pakistan's Afghanistan policy has had a direct impact on Afghan settlements,another important factor which has impacted Pakistan-Afghanistan relations.
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