Last Enriched Uranium Rumbles Out of Ukraine

A consignment of enriched uranium enough to build a nuclear weapon, according to a U.S. expert has rumbled out of a Ukrainian railway depot bound for Russia, a move planned to correspond with an international summit on nuclear security.

The 19 kilograms of spent extremely enriched uranium, loaded in four containers onto rail carriers in a high-security operation, was the last such material to be detached from the ex-Soviet republic under a two-year program with the United States and Russia.

"What you are seeing here is sufficient material to make one nuclear weapon," Andrew Bieniawski, director of the Global Reduction Threat plan of the U.S. National Nuclear Security Administration, said as the containers were full under guard at the depot outside Kiev.