US detects 'minuscule' radioactivity from Japan

A radiation monitor in California detected a "minuscule" amount of an isotope from Japan's crippled nuclear power plant, officials said Friday, but insisted it was of no concern.

US boosts radiation monitoring in western states

The United States is deploying extra radiation monitors to western US outposts Alaska, Hawaii and Guam to detect any fallout from Japan's crippled nuclear plant, an official said Thursday.