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 ...

President Trump said "we'll be talking about gun laws as time goes by" in the wake of the Las Vegas shooting, and didn't address the silencer bill in Congress. (Video: The Washington Post, Photo: ...