Add Yahoo as a preferred source to see more of our stories on Google. Mourning and outrage have shaken the nation as mass shootings continue to mark some of the latest chapters of a long history of ...

How many people must die in a shooting before it’s termed a ‘mass shooting’? Four people? Two? None at all? One strict definition used in the past by the federal government says at least four victims ...

There is no consensus among organizations that track shootings in the U.S. about the definition of "mass shooting" Twenty-one shot dead in Uvalde, Texas. Ten in Buffalo, N.Y. Four in Tulsa, Okla.

There is no universal standard for what constitutes a mass shooting, potentially causing discrepancies in data and research among authorities and experts -- and confusion for the average person. "Some ...

Wednesday’s massacre in San Bernardino was the latest mass shooting in America. By some counts — including a heavily cited version — it was the 354th of the year. By a narrower definition, it was the ...