Russia using tactical nuclear weapon would be ‘serious mistake,’ Biden says

President Joe Biden on Tuesday warned Russia that use of a tactical nuclear weapon would be “an incredibly serious mistake.” The president was speaking after getting an updated COVID booster at the White House. Biden was asked by reporters about possible use by Russia of nuclear weapons. Earlier this month, Biden warned that the risk of nuclear “Armageddon” is at the highest level since the 1962 Cuban Missile Crisis, as Russian officials spoke of the possibility of using tactical nuclear weapons after suffering massive setbacks in the invasion of Ukraine.