As the country tried to find comfort and make sense of Friday's mass shootings in Newtown, Connecticut, the focus began to shift from horror to sympathy for the families of the 26 victims and to outrage over how such a tragedy could have happened in the first place.
Related: Are School Shootings Parents' Newest Worst Nightmare?
What's to blame for this and other recent mass shootings in the United States? There are no easy answers, but Americans are pointing their fingers at several possibilities.
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