G7 countries on Friday insisted on their support for the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), warning of the dangers from a Russian and Chinese build-up. “We are concerned with China’s and Russia’s significant nuclear weapons build-up and modernisation,” the G7 Non-proliferation Directors Group said in a statement published on the French foreign ministry website. The group brings together the diplomats from the Group of Seven countries – Britain, Canada, France, Germany,...