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breaking tonight, authorities in las vegas say the person who opened fire on the campus of university of nevada at las vegas unlv this afternoon is dead. police report multiple victims have been taken to area hospitals but they are not saying what their injuries are, at least not yet, nor are they talking about a motive for the shooter. chief correspondent jonathan hunt is following this story from los angeles. good evening, jonathan. >> good evening, bret. we got the first word from l...