Russian President Vladimir Putin addressed a scaled-back military parade in Moscow's Red Square on Saturday, saying Russian soldiers in Ukraine were fighting an "aggressive force" backed by all of NATO. The traditional Victory Day parade commemorates the defeat of Nazi Germany in World War II. Images broadcast on state television showed a formation of soldiers carrying the Russian flag into the square. "Victory has always been and will be ours," Putin said in his speech. "The key to success is our moral strength, courage and valor, our unity and ability to endure anything and overcome any challenge." Russian soldiers in Ukraine "are confronting an aggressive force armed and supported by the entire NATO bloc," he said, adding that he believed they are fighting a "just" cause.…