In this handout photo released by Russian Defense Ministry Press Service, Russian nuclear submarines Prince Vladimir, above, and Yekaterinburg stay berthside at a Russian naval base in Gazhiyevo, Kola Peninsula, Russia, Russia, Tuesday, April 13, 2021. Russian Defense Minister Sergei Shoigu on Tuesday described a massive military buildup in western Russia as part of drills intended to check the armed forces' readiness amid the threats posed by NATO. (Vadim Savitsky/Russian Defense Ministry Press Service via AP)