In the aftermath of the massacre at Sandy Hook elementary school in Newtown, Conn., President Obama has moved to strengthen America's gun laws, and public opinion has swung significantly in support of stricter gun control. Gun-rights advocates have responded passionately, but opposition has also begun to take on uglier forms — most notably in conspiracy theories that contend the shooting was a hoax perpetrated by the government, the media, or some wildly improbable combination of the two.

What kind of conspiracy theories are out there? One contends that something is amiss because the adults in Newtown — particularly Robbie Parker, who lost his 6-year-old daughter Emilie in the shooting — haven't grieved hard enough. According to this theory, many of the shattered adults you've seen on camera are actors. Another claims that Emilie is still alive, appearing in a photograph with President Obama (the person in the photo is Emilie's sister). Yet another claims that there were other gunmen besides Adam Lanza. For a comprehensive list, as well as a thorough debunking (not that you'd need one).

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