The International Atomic Energy Association is reporting missing nuclear material in Libya. There is major concern about who possesses 2.5 tons of natural uranium left over from the era of the former Libyan strongman, Muammar Gaddafi. The World’s Marco Werman speaks with Scott Roecker, the vice president of the Nuclear Threat Initiative, about where the material was being stored and what could happen if it has fallen into the wrong hands in war-torn Libya.