russia, pursue new partnerships to lock down these sensitive materials. >> that was four years ago tomorrow, president obama said the united states would complete this mission by now, by 2013. so how's that going? the goal again is to get all the vulnerable nuclear material around the world locked up by the end of this year, end of 2013. there's about nine months to go. toward that end we have something to report tonight. exclusively tonight we can report on this show the country where president obama gave that speech four years ago, the czech republic, that country is the latest nation on earth to have completely cleaned out or locked down all of its loose nuclear material. we can report tonight for the first time anywhere that secretly, in late march under an incredible amount of security, the united states national nuclear security administration