Millions of Russians in the south of the country were left without electricity on Tuesday after a power unit at the Rostov nuclear power plant was shut down due to a malfunction. The Rostov nuclear power plant supplies power to the Russia's entire Southern Federal District, and rolling power outages affected residents of Russia's Krasnodar Territory, Rostov region, Sevastopol, and Crimea, the Black Sea peninsula illegally annexed by President Vladimir Putin from Ukraine in 2014. Russia's state-owned energy group Rosatom said one of the nuclear power plant's four power units was shut down due to a malfunction of the turbine...