When "geopolitical mistrust and competition" has pushed the nuclear risk to Cold War levels, total elimination of such weapons is the only route to a peaceful future, the UN chief has said. Secretary-General António Guterres issued his call in a statement marking the International Day for the Total Elimination of Nuclear Weapons on Tuesday. He warned that hard-won progress over many decades to prevent the use, spread and testing of nuclear weapons is being undone, and called for nuclear disarmament and a strengthened regime of non-proliferation. ## **Resurgent threat** In the decades since the nuclear attacks on Hiroshima and Nagasaki,…