U.S. President Joe Biden and Ukraine President Volodymyr Zelenskyy.
  • President Joe Biden had a major mix-up while speaking at a NATO summit on Thursday.
  • The 81-year-old president introduced Volodymyr Zelenskyy as Vladimir Putin.
  • Biden quickly corrected himself and told Zelenskyy he was "better" than Putin. 

President Joe Biden introduced Ukrainian President Volodymyr Zelenskyy as Russian President Vladimir Putin in a cringeworthy moment at a NATO conference on Thursday.