How Did US Miss the Islamic State Threat?

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underestimated - v. thought of someone or something as being lower in ability than that person or thing actually is

destabilized - v. to cause a government to be unable to continue working in the usual or desired way

junior varsity - n. a sports team whose members are less experienced and usually younger than members on a varsity team

misstep - n. an action or decision that is a mistake

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