25th anniversary of the Columbine High School massacre proves that the gun lobby won Opinion: More guns, more than 4,800 firearms death already this year, 404 school shootings since 1999, and the Columbine massacre isn't even in the top 10 anymore. Show Caption Hide Caption Arizona educators, police deal with growing threat of guns in schools Almost 2,200 gun threats were called in to Arizona police departments over an almost four-year period, according to an Arizona Republic and azcentral.com investigation. Good work is being done by Giffords Law Center to Prevent Gun Violence, Brady Campaign to Prevent Gun Violence, Coalition to Stop Gun Violence, Everytown for Gun Safety, Moms Demand Action for Gun Sense in America and others.