By Vitalii Hnydyi KHARKIV, Ukraine (Reuters) – A lifetime ago and 1,400 km away, Margarita Morozova lived through the World War Two siege of Leningrad. Now the 87-year-old Ukrainian finds herself once more in a city under attack. The retired librarian lives in Kharkiv, a Ukrainian city of 1.5 million people that lies 25 km from the Russian border. It has been barraged by Russian air and rocket strikes that have reduced many buildings to rubble. “I could never imagine that a new war would start in my old age. In my worst nightmare, I could not even imagine that such a massacre would be repeated…