- Putin updates Russia’s nuclear doctrine after Biden’s arms decision on Ukraine CNN
- Putin Lowers Nuclear Weapons Threshold After U.S. Allows Ukraine to Use Missiles Against Russia The New York Times
- Russia-Ukraine war live: Ukraine’s use of western missiles against Russia could lead to nuclear response, says Moscow The Guardian
- Putin lowered Russia’s threshold for a nuclear attack after Ukraine got approval for deeper strikes Business Insider
- Vladimir Putin signs revised Russian doctrine to lower threshold for potential nuclear strike ABC News
