Putin's Nuclear Posturing Escalates Tensions with West

Russian President Vladimir Putin has signed a revised nuclear doctrine that lowers the threshold for using nuclear weapons, suggesting they could be used in response to attacks by Ukraine with American support. The doctrine expands the scope of nuclear deterrence to include NATO and states that Russia may use nuclear weapons if its sovereignty is threatened by conventional attacks. This move follows Ukraine's use of U.S.-provided long-range missiles and marks a significant shift in the ongoing conflict, as Russia continues to make nuclear threats to deter Western support for Ukraine.