Reality check on frequency of mass killings from Harvard professor

At least one professor's stance based on stats:

"We can get misled if we focus on rampage killings like Newtown," says the man we've chosen for this week's CNN Profiles.
"To concentrate all of our violence reduction efforts on the most unpredictable, the hardest to control, the craziest incidents is, I think, a misallocation of resources," our guest tells us. He adds, "if we want to keep most people from being killed, it's the wrong place to obsess."

http://cnnradio.cnn.com/2012/12/21/c...nce/?hpt=hp_t1

CNN is being oddly supportive of the 2A lately, they are beginning to scare me. I like the trend, but the source frightens me.

what's that they say "keep your friends close and your enimies closer"?