2014 Nuclear Security Summit was a summit held in The Hague , the Netherlands , on March 24 and 25 , 2014 . It was the third edition of the conference , succeeding the 2012 Nuclear Security Summit . The 2014 summit was attended by 58 world leaders ( 5 of which from observing international organizations ) , some 5,000 delegates and some 3,000 journalists . The representatives attending the summit included U.S. President Barack Obama and Chinese President Xi Jinping
2012 Nuclear Security Summit
2012 Nuclear Security Summit
2014 Nuclear Security Summit