The bleak reality of a list like this is that it leaves out so many more.
There have been dozens of mass shootings in the United States in just the past five years, according to the Violence Project, which maintains a database of attacks in which at least four people were killed.
And before that, many more were seared into memories: San Bernardino, Calif., and Charleston, S.C., in 2015; Newtown, Conn., and Aurora, Colo., in 2012; Virginia Tech in 2007, among them.
Each new attack is a reminder of all of the others that came before it, as the nation has been unable to curb an epidemic of gun violence that far outpaces other countries. These are just some of the horrors that have traumatized the nation.
Authors: Daniel Victor and Jenny Gross
Source: The New York Times