Kremlin warns of nuclear war if the European Union backs Ukraine’s use of long-range weapons on Russian soil, escalating tensions to Cold War levels.

Russia warned the West and Ukraine on Friday of "disastrous consequences" if Kyiv moved against close Russian ally Belarus, making clear it would intervene to defend a country where it has deployed tactical nuclear weapons.

Former Los Alamos lab director Siegfried Hecker proposes a series of nine questions on great power competition, the global nuclear order, proliferation, and the role of nuclear energy that journalists and citizens should ask the 2024 presidential candidates.