New York (AFP) – Families of nine victims of the Sandy Hook school shooting have reached a $73-million settlement with US gunmaker Remington, in a landmark deal for a country traumatized by campus massacres. Lawyers for the plaintiffs said the settlement marks the first time a gun maker has been held liable for a mass shooting in the United States. Twenty-six children and teachers were shot dead at the elementary school in Newtown, Connecticut by 20-year-old gunman Adam Lanza in 2012. The killings — the second-deadliest school massacre in US history — stunned Americans, with many thinking th…