In 1955, the Soviet Union tested a bomb designated RDS-37 at a missile testing site in northeast Kazakhstan. The bomb’s power had been scaled down for the test, but a relatively rare weather phenomenon gave it an unexpected, and destructive, increase in power.
In early October of 1948, the U.S. Steel plant and the Donora Zinc Works were working away, and most of the inhabitants of Donora were working with them. By November seventy people were dead and thousands more were sick. Why?