Ukraine promised to create shelters with heat and water and encouraged citizens to conserve energy as a harsh winter loomed amid relentless Russian strikes that have left its power structure in tatters. POWER SUPPLIES * The head of Ukraine's national power grid operator said the damage dealt to power-generating facilities by Russian missile attacks was "colossal" but he dismissed the need to evacuate civilians. * Special "invincibility centres" will be set up around Ukraine to provide electricity, heat, water, internet, mobile phone connections and pharmacy service, free of charge and around the clock, President Volodymyr Zelenskiy said. * The Kremlin...