By Vitalii Hnidyi KHARKIV, Ukraine (Reuters) – Deep under the streets of Kharkiv in eastern Ukraine hundreds of people are sheltering from fierce Russian bombardment, occupying the Heroiv Pratsi metro station where they do what they can to get comfortable. From tiny babies to the elderly, residents sit or lie on mattresses and blankets arranged on the ground beside ticket machines, on platforms and inside trains halted alongside. Some look at mobile phones, others do laundry which they dry on the handrails of the train, mothers feed toddlers and a man hurries past with a kettle full of water. …