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Letter to Frist May Hold Poison

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Letter to Frist May Hold Poison

U.S.

Letter to Frist May Hold Poison

Letter to Frist May Hold Poison

  • Download
  • <iframe src="https://www.npr.org/player/embed/1638737/1638738" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

Preliminary tests suggest a white, powdery substance found in the mailroom of Senate Majority Leader Bill Frist Monday was ricin, a poison derived from the castor bean. Results from further tests are expected Tuesday. Three U.S. Senate office building are closed, though the U.S. Capitol remains open. Hear NPR's David Kestenbaum.

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