Two children were killed and 17 people are injured in a Minneapolis school shooting; President Trump orders flags to be flown at half-staff after the deadly shooting in Minneapolis.
Children return to school with lessons in math, grammar -- and how to survive a school shooting. With each act of gun violence, they see that the adults in charge tolerate a political system unwilling to address it. "CBS Evening News" co-anchor John Dickerson explains.
According to the Gun Violence Archive, more than 830 children in the U.S. ages 17 or younger have died from gunshot wounds so far this year. Gun violence researcher Jillian Peterson joins to discuss.
