A bipartisan group of senators introduced a bill yesterday to strengthen worldwide efforts to identify and secure radiological material that terrorists could use to make "dirty bombs." "Each year, many radioactive sources worldwide -- such as certain X-ray equipment and portable power generators -- are abandoned or stolen and leak out of the existing control system," one of the bill's co-sponsors, Senate Foreign Relations Committee Chairman Joseph Biden (D-DE), said in a floor statement yesterday. "We must, and we can,...
