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       SAN JUAN, Puerto Rico (AP)--Puerto
      Rico's government is threatening to sue the U.S. Navy for damaging
      its environment, adding a new element to a growing controversy
      over the Navy's live-fire exercises on Vieques. 
      The [government] accuses the Navy
      of polluting the air, water and sea bed near Vieques and says
      the Puerto Rican government will sue if by Aug. 9 "these
      violations have not been remedied" - an apparent request
      for a clean-up operation. -DOW JONES NEWS SERVICE
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