Gun violence on the rise in US films: study

Updated November 13 2013 - 3:18pm, first published 2:14pm
The Batman film <i>Dark Knight Rises</i> is among the violence-rich films released with a PG-13 rating in the US.
The Batman film <i>Dark Knight Rises</i> is among the violence-rich films released with a PG-13 rating in the US.

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