Nuclear war in US would wipe out 300m: Report

A report in Scientific American warns of the catastrophic consequences of a nuclear attack on the United States, with an estimated 300 million people at risk of death due to exposure to radioactive fallout within four days. The study suggests that intercontinental ballistic missile (ICBM) launch facilities would likely be targeted, putting the entire US population, along with Canada and northern Mexico, at risk. Even with prior notice and shelter, several million deaths could still occur.