From limited access to health care, to contaminated drinking water and the growing opioid epidemic, America’s health is constantly being threatened and children are often hit the hardest. Co-founder of the Children's Health Fund and public health activist Dr. Irwin Redlener joins Salon’s Amanda Marcotte to discuss his new book, “The Future of Us: What the Dreams of Children Mean for Twenty-First-Century America,” and the biggest threats to children’s health today.