Obama: Nuclear weapons a challenge

Barack Obama said today that the threat of nuclear weapons remains a potent challenge for the globe to confront, telling foreign leaders that “the security of the world depends on the actions that we take”.

The US president, speaking at a nuclear security summit in South Korea, said the international community had made progress in removing nuclear materials and improving security at nuclear facilities around the globe. As a result, he said, more of the world’s nuclear materials will not fall into the hands of terrorists.