Released Russian dissident Kara-Murza visits US Congress

WASHINGTON, Sept 16 (Reuters) - Russian activist Vladimir Kara-Murza shook his head in disbelief as he addressed lawmakers and diplomats in a U.S. Senate hearing room on Tuesday, just weeks after he was released from prison in Siberia in a major prisoner swap. "The word surreal doesn't even come close to describing what I feel now," the dissident said at an event intended to highlight what participants described as the plight of hundreds of prisoners still detained in Russia for their political beliefs. Coinciding with Kara-Murza's visit, Democratic Senator Ben...