By Janis Laizans and Elizabeth Piper KYIV (Reuters) – Ukraine and its allies blamed Russia for a missile attack that killed at least 52 people at a train station packed with women, children and the elderly fleeing the threat of a Russian offensive in the east. As regional authorities scrambled to continue evacuating the vulnerable, European Union leaders visited Kyiv to offer President Volodymyr Zelenskiy support and expedite Ukraine’s path toward EU membership. Zelenskiy called the strike in Kramatorsk in the eastern region of Donetsk a deliberate attack on civilians. The town’s mayor estimat…