于是，它们让我们看到了一种快速变化的充满危险的威胁，美国前海军秘书理查德·丹岑曾经将这些病毒称为发动“没有硝烟战争”的武器。

And in that way, they offer a glimpse of a rapidly evolving class of dangerous threats that former U.S. Navy Secretary Richard Danzig once described as instruments of "nonexplosive warfare."

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他说，他仍然坚持认为，伊拉克受到了外国入侵。当初美国发起伊拉克战争的理由是伊拉克制造大规模杀伤性武器，但是并没有证据表明该前提的成立。

He said he continued to lament that Iraq had been invaded on what he called a false pretext despite the lack of evidence it was making weapons of mass destruction.

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