Full Story 6: Albright cites a 1987 incident in Goiania, Brazil, in which highly radioactive cesium was removed from an abandoned clinic.

"The material got out, and in the end four people died, mostly children," he said. "And they spread the material by foot and hand."

In 1995, Chechen separatists put a canister in a Moscow, Russia, park containing a highly radioactive byproduct of nuclear fission