U.S. Unfazed by Putin's Nuclear Threats, Continues Supporting Ukraine
- U.S. has not changed its nuclear posture in response to Putin's threats
- No indications Russia preparing to use nuclear weapons in Ukraine
- Putin appearing to restate Russia's policy to use nukes if sovereignty threatened
- White House says Russia's nuclear rhetoric reckless and irresponsible
- U.S. will continue supporting Ukraine against Russian aggression