A: The experiment floated radioactive samples on a gas stream, then hit the sample with lasers at high temperatures. B: Initially, plutonium oxide samples were matte grey but they changed to shiny ...

1965-Aerial view of the Purex solvent extraction plant at the Department of Energy's Hanford Site, where plutonium is recovered from irradiated uranium as a product for the nation's defense program.

The United States has about three times more waste plutonium than the last official government estimate released 14 years ago, said Robert Alvarez, senior scholar at the Institute for Policy Studies.

SPOKANE -- Seven decades after making key portions of the atomic bomb dropped on Nagasaki, Japan, workers at the Hanford Nuclear Reservation are being exposed to radiation as they tear down buildings ...

SPOKANE, Wash. (AP) — Seven decades after making key portions of the atomic bomb dropped on Nagasaki, Japan, workers at the Hanford Nuclear Reservation are being exposed to radiation as they tear down ...