Heidi Rathjen has been calling for a ban on assault-style rifles since 1989, when a gunman opened fire on her classmates at Montreal’s École Polytechnique.
The shooting, in which 14 women were killed and more than a dozen injured, was a turning point for Canada, changing how the country viewed gun violence.
More than two decades later, after another deadly mass shooting in 2020, Ottawa did roll out a ban on some 2,500 models of such “assault-style” weapons.
