How Obama Grieved With All of Us After the Newtown Shootings

Four years ago, a lone gunman at Sandy Hook school in Newtown, Connecticut, killed 20 children and six adults. Like most of the country, I unfortunately remember that day all too well. I was sitting in my office, drinking a coffee, when the horrific news appeared in my Twitter feed: Another school shooting. Not at a high school, but at an elementary school. The majority of the murders took place in two classrooms full of first-graders. That tragedy happened several years before I had my own daug...