Wow. Our experiment is off to a great start—let's see if we can finish it off sooner than expected.
Editor's note: This dataset originally covered 1982-2012 and has since been expanded through 2016. For more context and analysis, see our Guide to Mass Shootings in America. You can also download this data in CSV, XLS, or TXT formats, or click here for the full Google spreadsheet view. (The embedded version below does not support expanding the cells to see the full text in some places, but you can access it these other ways.)