Russian President Vladimir Putin, Defense Minister Sergei Shoigu and Deputy Defense Minister Alexey Krivoruchko attend the launch of two nuclear submarines armed with intercontinental ballistic missiles along with two diesel-powered submarines and two corvettes at shipyards in Severodvinsk, St. Petersburg and Komsomolsk-on-Amur, via a video call during the International military-technical forum "Army-2021" at Patriot Congress and Exhibition Centre in Moscow region, Russia.