A Radioactive Cloud Wafts Over Europe, With Russia as Chief Suspect High levels of a substance called ruthenium 106 detected over the Continent have prompted concern about a possible cover-up by Moscow. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Julian Assange’s Seven Strange Years in Self-Imposed IsolationAt War: Afghan War Casualty Report: April 5-11Kremlin Moves Toward Control of Internet, Raising Censorship FearsLens: Is This the Best Photo of the Year?Your Friday BriefingRussian Court Orders Release of Michael Calvey, American Businessman