‘We’ve got to be worried’ about Russia’s warships: Former KGB spy The HillUS submarine pulls into Guantanamo Bay a day after Russian warships arrive in Cuba The Associated PressRussian warship near Cuba can carry Putin’s prized hypersonic missiles Business InsiderRussian Flotilla Off Florida Coast Sparks Deployment of US Navy Destroyers, Planes Military.comWhat are Russian warships doing in the Caribbean? The Washington Post