Russian President Vladimir Putin holds binoculars while watching the military exercises Center-2019 at Donguz shooting range near Orenburg, Russia, in Sept. 20, 2019. Russian President Vladimir Putin has warned that he wouldn't hesitate to use nuclear weapons to ward off Ukraine's attempt to reclaim control of its occupied regions that Moscow is about to absorb. (Alexei Nikolsky, Sputnik, Kremlin Pool Photo via AP, File)