After a gunman armed with a semi-automatic rifle and 30-round magazine killed 14 women at Montreal's École Polytechnique in 1989, Canada's Parliament was plunged into a debate on how to stop it from recurring. By the end of 1991, a package of gun legislation designed to respond to the massacre, backed by then-Justice Minister Kim Campbell, made it into law. One key part of the new law restricted the number of rounds rifle and pistol magazines were allowed to hold.... (GunPolicy.org)