ABC News Chief National Correspondent Matt Gutman recounts the dramatic story that gripped the world in June 2018 when twelve boys, ranging in age from eleven to sixteen, and their soccer coach were trapped in a flooded cave miles underground for nearly three weeks in Thailand. Gutman covered the story intensively, went deep inside the caves himself and interviewed dozens of rescuers, experts and eyewitnesses around the world. Dr. Khoi Le joins him to discuss the ingenuity, bravery and sacrifice it took to succeed in this heroic mission.