As the dust settles on the Afghan war, the real winners are the U.S. military contractors. The longest war in American history led to the deaths of thousands of U.S. soldiers, tens of thousands of Afghan civilians and turned millions more to refugees. But the conflict was a grand victory for U.S. military contractors. In this episode of BizBeat, CGTN's Zheng Junfeng analyzes why American military contractors benefitted from the war.