The UK and the US are alarmed by intelligence suggesting Russia is sharing nuclear secrets with Iran in exchange for ballistic missiles to aid its war in Ukraine. During a summit, UK Prime Minister Keir Starmer and US President Joe Biden discussed this concerning military cooperation, which also involves Russia assisting Iran's uranium enrichment program. Tehran denies these allegations, while Russia has not directly refuted them. The potential collaboration could escalate global tensions and impact ongoing conflicts, including the Israel-Hamas war. Biden and Starmer also deliberated on Ukraine's request to use Western long-range missiles against Russia. Biden emphasized the seriousness of the situation while considering easing restrictions on missile usage by Ukraine.