AdvertisementWhat Putin's shake-up of top commanders could mean for the war in Ukraine06:30Download AudioResumeJanuary 14, 2023Mary Louise KellyAshley BrownKat LonsdorffacebookEmailIn a move that experts say is a key shift for Russia, the Kremlin has named General Valery Gerasimov as the new overall commander of the war in Ukraine. (AP)