U.S. Tests Underground Test at Nevada Proving Ground
Officials at a national proving ground in Nevada say scientists have conducted an underground experiment using high explosives to test the effectiveness of the nation's nuclear weapons.
National Nuclear Security Administration spokesman Darwin Morgan said Friday the Pollux subcritical experiment was conducted Wednesday at the Nevada National Security Site by researchers from the Los Alamos and Sandia national laboratories in New Mexico.
Pollux was the 27th such experiment since 1997 at the vast federal reservation 85 miles northwest of Las Vegas. The last was on Feb. 2, 2011. It was called Barolo B.
The experiments use explosives to test the properties of plutonium, but stop short of critical mass. That's the point at which a self-sustaining nuclear reaction occurs.
Citing a lack of leads, a police agency said Monday that it is closing the active investigation of the disappearance of Susan Powell, a Utah mother whose now-dead husband was a prime suspectMore >>
The lawyer for the family of missing Utah woman Susan Powell said Tuesday that even as local police close the active part of their investigation into her disappearance, federal authorities continue to review the case - a...More >>