Changes to Russia's nuclear doctrine have been drawn up and will be formalised as necessary, the Kremlin said on Tuesday, signalling again Moscow's concern over the latest U.S. decision on missile strikes from Ukraine.

President Biden's decision to allow Ukraine to fire U.S.-made and supplied missiles deeper into Russia — a major policy shift announced over the weekend after months of intense lobbying by Kyiv — has drawn a furious response from Moscow.

A video of President Joe Biden appearing to "wander off" into the Amazon rainforest has gone viral on social media. The clip comes from the end of Biden's press conference Sunday from a section of forest in Manaus,

Biden’s emphasis on climate change during his trip creates yet another contrast with Trump as the president prepares to leave office.