As of Monday, 340 mass shootings have taken place across the country so far this year. At that pace, the United States will experience 679 mass shootings in 2023, the second most in a calendar year since 2014, according to the Gun Violence Archive. The definition of a mass shooting differs among organizations and media outlets that track gun violence. For example, the online database Mass Shooting Tracker defines a mass shooting as any in which four or more are shot, including the shooter or shooters. The FBI defines a mass shooting as one in which at least four people are murdered with a gun.

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Persons: James Alan Fox, Fox, Baltimore Mayor Brandon Scott, Brendan O'Brien, Grant McCool Organizations: Northeastern University, Baltimore Mayor, CNN, South Baltimore's Brooklyn Homes, FBI, Thomson Locations: Baltimore, United States, South Baltimore's Brooklyn, Wichita , Kansas, Monterey Park , California, Allen , Texas, Chicago