UN Secretary-General António Guterres called for practical steps to reduce nuclear risks in a message to the Advisory Board on Disarmament Matters on 25 June. The message, delivered by disarmament chief Izumi Nakamitsu, warned that rising military expenditure, technological change and weakening trust were making international security more fragile.
The appeal stressed transparency, confidence-building and cooperation to lower the danger of miscalculation. It placed nuclear risk reduction within a broader concern about the erosion of international norms and the challenges posed by emerging technologies. The statement was a call for policy action, not the announcement of a newly signed arms-control agreement. Its significance lies in the UN's effort to keep risk reduction on the diplomatic agenda during a period of heightened tension.