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Rachel Maddow

Terrorism's tools within reach of the inexpert

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Michael Leiter, former director of the National Counterterrorism Center and an NBC News national security analyst, talks with Rachel Maddow about preliminary reports of the toxin ricin found in letters to President Obama and Mississippi Senator Roger Wicker, and whether developments in the Boston Marathon explosion case can be seen as breakthroughs.Apr.19.2013

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