Gun violence in America, in 17 maps and charts - Vox

In December 2012, a gunman walked into Sandy Hook Elementary School in Newtown, Connecticut, and killed 20 children, six adults, and himself. Since then, there have been at least 986 mass shootings, with shooters killing at least 1,234 people and wounding 3,565 more, as this map (click to view the interactive version) shows.

The counts come from the Mass Shooting Tracker, a crowdsourced database that tracks shootings since 2013. As with any crowdsourced database, it's likely missing some shootings, and some of the shootings are missing details.

The tracker uses a fairly broad definition of "mass shooting": It includes not just shootings in which four or more people were murdered, but shootings in which four or more people were shot at all. The database's organizers explained their reasoning on their website: "For instance, in 2012 Travis Steed and others shot 18 people total. Miraculously, he only killed one. Under the incorrect definition of mass shooting, that event would not be considered a mass shooting! Arguing that 18 people shot during one event is not a mass shooting is absurd."

Even under this broad definition, it's worth noting that mass shootings make up a tiny portion of America’s firearm deaths, which totaled more than 32,000 in 2013.

Image credit: Soo Oh/Vox