As Russia's attacks on Ukraine's cities intensify and autumn's cooler temperatures hint at another tough winter to come, Ukrainians are wrestling with how to meet the twin challenges ahead: Russian drone and missile strikes and the biting cold. "It was a very difficult winter last year in Kyiv," says mother of two Mariia Shostak, who is now packing her bags and leaving her small flat. With prolonged periods of sub-zero temperatures and frequent power cuts brought about by Russia's attack on the country's power grid, last winter was one of the hardest so far. "There were some days and weeks...