Russia's state weather agency said on Monday that a cloud of radioactive gases that swept across a Russian town earlier this month was produced by fast-decaying radioactive isotopes released by an explosion at the Nyonoksa testing range. Though Russia's explanations for what occurred have varied, the blast has been tied to a failed missile test.

When we hear the words "Fukushima disaster," most of us think of Fukushima Daiichi, the nuclear power plant wracked by three core meltdowns and three reactor building explosions following the March 2011 earthquake and tsunami in Japan. Without electricity to run the plant's cooling systems, managers and workers couldn't avert catastrophe: People around the world [...]