7/20 Motive still a question in massacre; Aspiring broadcaster a victims in Aurora shooting

      |The big-screen fantasy of the "Dark Knight Rises" turned into real-life tragedy for moviegoers in Aurora, Colo. Authorities still don't know what motivated the killer; Also, Jessica Redfield, an aspiring broadcaster who just a month ago narrowly escaped death in another mass shooting at a shopping mall in Toronto was one of the victims in today's tragedy.

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