After Russian President Vladimir Putin ordered the Russian military's nuclear deterrent to be placed on special combat readiness, the U.S. ambassador to the United Nations called the move an unacceptable escalation.
According to reports, on the 27th local time, Thomas Greenfield, the US ambassador to the United Nations, told CBS: "This means that President Putin is continuing to escalate this conflict in a completely unacceptable way, and we must continue to do the best possible. A powerful way to contain his actions."
