Gun Lobby - Redefining School Shooting to Not Include a lot of dead students

http://www.alternet.org/gun-lobbys-new-tactic-redefining-school-shootings-so-they-dont-count?akid=11917.294211.itcYZ3&rd=1&src=newsletter1002736&t=21

Johnson takes it upon himself to debunk the claim, made by the gun reform group  Everytown for Gun Safety, backed by Michael Bloomberg, that  there have been 74 school shootings since Adam Lanza killed 20 children, six adults and himself at Sandy Hook elementary School 18 months ago. In fact, Johnson concludes,  there have only been seven. How does he manage this feat of mathematical magic? Simple: by narrowing the definition of “school shooting” so far that almost none of them count.