Throughout most of the eighteen fifties, war was a continual threat between the North and the South over the issue of slavery.
VOA: special.2009.06.18
Today's nuclear threat differs from that of the Cold War, according to U.S.Secretary of State Hillary Clinton, "The threat of nuclear war, nuclear attack that we grew up with in the Cold War has diminished.
VOA: standard.2010.04.11
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