Despite Putin’s threats, according to a Biden aide, the US has not changed its nuclear posture.

The danger of Russia using nuclear weapons during its invasion on Ukraine exists, according to UN Secretary-General António Guterres.

Guterres told reporters that Russian President Vladimir Putin’s decision to put his nuclear forces on high alert early in the invasion was a terrifying event.

“The prospect of nuclear conflict, once unthinkable, is now back within the realm of possibility,” he added. “It is time to stop the horror unleashed on the people of Ukraine and get on the path of diplomacy and peace.”

Guterres urged for the protection of Ukraine’s nuclear facilities and announced the U.N. To help Ukrainians, the US is giving $40 million from its Central Emergency Response Fund.

This money will be used to help get food, water, medications, and other life-saving commodities into the country, as well as providing cash assistance.

On February 24, Russian soldiers launched a full-fledged military invasion of Ukraine, which lasted over three weeks. Putin upgraded the alert level for his nuclear forces to a special combat duty regime four days later.

Despite the apparent danger, President Biden’s national security advisor, Jake Sullivan, indicated Sunday that Washington’s nuclear alert levels were unchanged.

The US has not changed its nuclear posture, but it is something that we monitor day by day, hour by hour, since the president considers it a top priority.