Putin signs new nuclear doctrine in response to US missile support for Ukraine

President Vladimir Putin has signed a new nuclear doctrine, stating that any conventional attack on Russia supported by a nuclear power will be viewed as a joint attack. This change comes after the U.S. allowed Ukraine to use longer-range missiles against Russian targets. The updated doctrine expands the conditions under which Russia might use nuclear weapons, including responses to massive aerial attacks. It emphasizes that aggression from a non-nuclear power, with nuclear support, is considered an attack by the entire military bloc involved. This revision follows months of calls from Russian officials to strengthen the nuclear policy, as previous versions were seen as ineffective in deterring Western support for Ukraine. The new doctrine reflects a broader interpretation of potential triggers for nuclear response.