KYIV, Ukraine (AP) — The mayor of Kyiv, Ukraine's capital, is warning residents that they must prepare for the worst this winter if Russia keeps striking the country's energy infrastructure — and that means having no electricity, water or heat in the freezing cold cannot be ruled out.“We are doing everything to avoid this. But let’s be frank, our enemies are doing everything for the city to be without heat, without electricity, without water supply, in general, so we all die. And the future of the country and the future of each of us depends on how prepared we are...