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Ahead on the 9/4 Maddow show

Tonight's guests:Senator Chris Murphy, (D) Connecticut, member of the Foreign Relations Committee, voted against U.S. military force in SyriaEdwin Lyman, Union

Tonight's guests:

  • Senator Chris Murphy, (D) Connecticut, member of the Foreign Relations Committee, voted against U.S. military force in Syria
  • Edwin Lyman, Union of Concerned Scientists