Even at the height of their Cold War nuclear rivalry, the United States and the Soviet Union thrashed out a series of treaties to keep the arms race from spiralling out of control. Though they agreed on little else,

The Russian Defense Ministry said on Friday that it had struck western Ukraine with a nuclear-capable intermediate-range ballistic missile, an ominous warning by President Vladimir V. Putin of Russia as U.S.-led negotiations to end the war have gained steam.

Russia launched a barrage of missiles at Ukraine overnight Thursday, killing at least four people in the capital Kyiv and hitting infrastructure in the country’s west with a ballistic missile, authorities said,

President Trump's actions in Venezuela also are causing unease in Western nations and giving the Kremlin fresh talking points to defend its war in Ukraine.

President Trump’s efforts to court President Vladimir V. Putin of Russia are rife with contradictions about stability and displays of American power.

Alexei Zhuravlev's explosive statement, which included nuclear threats against Russia's enemies, comes at a time when reports indicate the Kremlin believes a confrontation with the United States is inevitable,

Russia formally asked the United States to halt pursuit of Venezuelan oil tanker Marinera after the vessel escaped U.S. Coast Guard interception in the Caribbean.

CIA spy who sold US secrets to Russia dies in prison aged 84 - Aldrich Ames confessed to being paid over $2.5 million from Moscow for CIA secrets