“The sample of highly-enriched uranium, of a type that could be used in a nuclear bomb, arrived here on a rainy summer day four years ago, in a blue shopping bag carried by a former policeman.
According to court documents, the bag quickly passed through the hands of three others on its way to a prospective buyer. It was not the first time such material had passed through this city, raising international alarms: It had happened twice before. And mysteriously, in all three cases, spanning more than a decade, the nuclear material appeared to have the same origin – a restricted military installation in Russia.”