The Nuclear Materials Security Index notes progress in several countries. In the last two years, seven have given up most of their weapons-grade uranium and plutonium, while others are tightening security measures.
A potential $1.5 billion oil-for-goods swap between Iran and Russia has prompted harsh responses from Washington, which says such a deal could trigger new US sanctions.
An Iran nuclear deal would ease economic sanctions on the Islamic nation in exchange for limits to its uranium enrichment program. Oil prices slipped Monday, on news of the Iran nuclear deal, set for Jan. 20, but the promise of new Iranian oil may be overhyped.