KYIV (Reuters) – Ukrainian railways, celebrating the liberation of the southern city of Kherson, on Sunday offered symbolic tickets to the cities that remain under Russian control, promising that tickets can be used after they are liberated. Jubilant residents welcomed Ukrainian troops arriving in the centre of Kherson on Friday after Russia abandoned the only regional capital it had captured since its invasion began in February. “Today you can order tickets for the first three trains from Kyiv to five cities: already de-occupied Kherson, as well as Mariupol, Donetsk, Luhansk and Simferopol,” …