Russia has the world’s largest arsenal of nuclear warheads, while Ukraine does not have a single one. Over the past decade, Moscow has not shied away from repeatedly reminding the world of its devastating nuclear might.

North Korea in recent years has flight tested various intermediate-range missiles, which if perfected, could reach the U.S. Pacific military hub of Guam. In recent months, North has been testing combining these missiles with purported hypersonic warheads to improve their survivability.

North Korea launched a medium-range ballistic missile into the Sea of Japan, South Korea’s military confirmed.

As Ukrainian forces mount a new offensive in Russia’s Kursk region, U.S. Secretary of State Antony Blinken on Monday said that success in this region would improve Kyiv’s bargaining position in any future ceasefire negotiations.