World leaders gathered recently in Washington D.C. to ensure terrorists never get access to a nuclear weapon. Unfortunately, Russia has a large stock of nuclear weapons and is not attending this summit. North Korea and Iran have never been invited. There’s concern nuclear materials will fall into the hands of terrorists, and there is concern about the large stockpiles dedicated to military purposes. The past three Nuclear Security Summits have helped more than a dozen countries get rid of nuclear materials, and began steps toward Obama’s goal of a world free of nuclear weapons. Listen to hear how world leaders are working to prevent nuclear terrorism and debate with your students other ways to prevent this.