This week, U.S. President Barack Obama asked Congress to dedicate $10 million toward studying the effects of violent media—including games, which he singled out during a speech Wednesday morning.

In the wake of last month's tragic shooting at Sandy Hook elementary school—and the revelation that killer Adam Lanza had enjoyed shooter games like Call of Duty—violent video games have again become a significant topic in national conversation. And as part of a bigger plan to fight gun violence, Obama wants to see more studies on how games affect our behavior.

But do we really need more research? What about the studies that have already been done? Have researchers found any links between video games and violence? Will violent video games really make kids more aggressive? Or is this all just a massive waste of time and money?

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