It's shameful that when child and teen gun deaths are compared in 23 high-income countries, 87 percent of all children under 15 killed by guns were in the United States. Our gun homicide rate for teens and young adults 15-24 years old was 42.7 times higher than the rate for the other countries combined. There are an estimated 283 million guns in civilian hands in America -- almost one gun per person. Why is the United States alone in allowing this unbridled epidemic of guns and public health hazard all over America to continue? As parents and grandparents and concerned adults and voters, it is up to us to tell our leaders no more.