Nuclear engineer Arnie Gundersen demonstrates how Fukushima’s fuel rods melted and shattered from Fairewinds Associates on Vimeo.

Arne Gundersen of Fairewinds Associates demonstrates how the fuel rods in the Fukushima DaiIchi nuclear power plants melt and shatter.

Meanwhile, iodine has been detected in dozens of municipal water supplies in the US and cesium-137 has been detected in Vermont milk.

Radiation from Japan has been detected in drinking water in 13 more American cities, and cesium-137 has been found in American milk—in Montpelier, Vermont—for the first time since the Japan nuclear disaster began, according to data released by the Environmental Protection Agency late Friday.