Strategists have worried about failing states ever since the end of the cold war.
自冷战结束之后，战略家们就对处于衰败的国家忧心忡忡。
He did research for the United States War Department.
这段时间中他为美国陆军部做研究。
During the Cold War, what was the main concern of the United States?
在冷战期间，美国的主要顾虑是什么？
During the Cold War, what was the main concern of the United States?
在冷战期间，美国的主要顾虑是什么？
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