Obama: Nuclear Security a ‘21st Security Challenge No One Nation Can Solve Alone’

“I convened our first summit six years ago in the same room because the danger of a terrorist group obtaining a nuclear weapon is one of the greatest threats to global security. Our nations committed ourselves to action-- concrete, tangible steps to secure the world’s vulnerable nuclear materials, and we continued our work at our summits in Seoul and the Hague, and I want again to thank our friends from the Republican of Korea and the Netherlands for their leadership on this critical issue."