KYIV/KHARKIV (Reuters) – Ukrainians said on Wednesday they were battling on in the port of Kherson, the first sizeable city Russia claimed to have seized, as air strikes and bombardment caused devastation in cities that Moscow’s bogged down forces have failed to capture. After nearly a week, Russia has yet to achieve its aim of overthrowing Ukraine’s government, but has, according to the Ukrainian emergency service, killed more than 2,000 civilians and destroyed hospitals, kindergartens and homes. The invasion has sent more than 870,000 people fleeing over Ukraine’s borders and retaliatory san…