At least 21 people, including two children, were killed after a Russian missile slammed into a Kyiv apartment block on Thursday morning, authorities said, as Ukrainian cities came under aerial attack for the third day in a row. Ukrainian President Volodymyr Zelenskyy  said the building had been virtually destroyed, and 20 people remain missing. Interior Minister Ihor Klymenko initially said more than 30 people were injured in the nine-story building.  Across Ukraine, Zelenskyy said that 180 structures were damaged by the Russian strikes, with 50 of the targets residential apartment blocks. Dozens of people were injured in strikes across the Ukrainian capital. Strikes on the northeastern city of Kharkiv injured 28 people, and two people were injured in strikes on the Black Sea port city of Odesa, he added. Zelenskyy said the Russian strikes mainly targeted residential apartment buildings Image: Valentyn Ogirenko/REUTERS What else do we know about the latest Russian attack?…