Classes at Evergreen High School in Colorado are canceled this week following a shooting in which a student reportedly shot two classmates before taking his own life. Jefferson County officials have not provided a timeline for the school’s reopening, leaving the community in a state of uncertainty.

Two children lost their lives, and 17 others were injured, when a shooter opened fire during a Mass at a Minneapolis school. As the community mourns and the nation watches, questions persist about how to prevent such devastation from happening again.