Russia has upped its hostile rhetoric against the Western allies of Ukraine and intensified threats of nuclear attack in response to the United States' authorization to the embattled nation to use American ATACMS to attack targets deep within Vladimir Putin 's territory. However, Knewz.com has learned that an actual nuclear attack by Russia is "unlikely," according to U.S. intelligence . Over a week prior, Russian President Putin made a very public response to Ukraine's first attacks on Russian