Nuclear weapons states upgrade warheads despite disarmament

Nuclear armed states continue to upgrade their stockpiles despite an international trend towards disarmament, the Stockholm International Peace Research Institute reported Monday. Between 2010 and 2015 the number of warheads fell from 22,600 to 15,850 according to the institute's annual disarmament report which said the US and Russia represented the bulk of the reduction. The institute also pointed to "extensive and expensive long-term modernization programmes" in the world's