 
  A rift between science and activism is undermining progress in the fight against AIDS  
 
 
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   Steering a suddenly lost GOP ship,   
 
 
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  Fear and pepper spray in St. Paul  
 
 
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  Self-declared financial ignoramus revels in the fact that investing ‘geniuses’ probably know less than  she  does  
 
 
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   This year, with such a close contest, the debates could have an impact like never before. Here’s what to watch for.