vault 2004 howard dean iowa caucus scream_00003510.jpg
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2004: The scream that doomed Howard Dean
This moment following a third place showing in the 2004 Iowa caucuses all but ended Howard Dean's run for president.
1:16 • Source: CNN
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vault 2004 howard dean iowa caucus scream_00003510.jpg
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2004: The scream that doomed Howard Dean
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vault 1989 tiananmen square man vs tank_00004819.jpg
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1989: Man vs. tank in Tiananmen square
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1986: Space Shuttle Challenger explosion
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1995: O.J. Simpson found not guilty
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1989: How CNN covered fall of Berlin Wall
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1986: Oliver North and the Iran-Contra scandal
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Ronald Reagan's famous words: "Tear down this wall"
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