That was the "Mr. Gorbachev, tear down this wall" speech, and of course, John F.

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It was best said by historian Robert Kagan: President Obama needs to understand with regard to Iran that this is his "tear down this wall" moment with Russia.

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There is no "tear down this wall" clip by Bush.

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America, tear down this wall of ignorance and segregation.

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Mr. Gorbachev, tear down this wall.

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