"As the community mourned, attention turned to what lawmakers could do to prevent future instances of gun violence. In a highly contentious debate, the Democrat-controlled legislature passed a series of bills in 2013 to tighten the state’s gun laws. Among them were a measure to require universal background checks in order to prevent buyers from skirting background checks by purchasing weapons from private sellers online, for instance, and a ban on large-capacity ammunition magazines that hold more than 15 rounds, like those used in Columbine and Aurora. Two awful tragedies were enough to to galvanize lawmakers."