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A Guide to Mass Shootings in America

There have been at least 71 in the last three decades—and most of the killers got their guns legally.

| Updated: July 24, 2015, 4:30 PM ET

Here is a timeline of 62 mass shootings in the United States, from 1982 through 2012. For further details and our interactive map locating all of these cases, click here.

For further details and our interactive map locating all of these cases, click here.

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