A lot happens every day. Alliances shift, leaders change, and conflicts erupt. With In Brief, we’ll help you make sense of it all. Each week, experts will dig deep on a single issue happening in the world to help you better understand it.***Last week, Russian President Vladimir Putin reassigned Sergei Shoigu from defense minister to secretary of the national security council, effectively dismissing him from his post of twelve years. Putin picked Andrei Belousov, an economist and technocrat with no military experience, to take his place. Amidst a renewed Russian offensive in Ukraine, we asked five experts to explain the significance of this reshuffling.