mass shootings
来自:shuaijingkuxue
how common are mass shootings in the u.s? - story
![[oc] mass shootings in the united states per million people](http://i.handsetwalls.com/uploads/i_0_1953648889x2447418546_253.jpg)
[oc] mass shootings in the united states per million people
world insights: sadly, mass shootings are a daily affair in
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