. . . . . . . . "mass-shooting" . . "with firearms" . . . "one day he put his theory in to practice" . . . . "shooting" . . . "Mass_shooting#Europe" . . . . . "Mass Shooting" . . "random shootings" . . "Mass_shooting#Australia" . . . . . . . . . . . . . . . . . . . . . "Shooting" . . . "gun attack" . . "mass shooting" . . . "and guns" . . . "shootings" . . . "Mass_shooting#Israel" . . . . . . . . . "Mass_shooting#By_continent_and_region" . . . . "mass shootings" . . . "planning to return to the company the next day and kill them one by one" . . "shot" . . . "attacked a hospital" . . . . . . . "mass shooter" . "Mass shootings" . . . . . . . . . . "Mass shooting" . "opened fire" . "Mass shooting" . "single-person shooting incident" . "gunned down" . "massacre" . . . . "shooting spree" . .