At least 31 people were killed and a 125 more injured in waves of Russian missile attacks across Ukraine, the Interior Ministry said on Monday, a day before NATO leaders gather in Washington to discuss their support for the government in Kiev. While the missiles struck sites across Ukraine, it was an attack on a large children’s hospital in Kiev left Ukrainians especially stunned. The city’s mayor, Vitali Klitschko, said 16 people were injured at the hospital, including seven children. President Volodymyr Zelensky posted a video on social media showing portions of the building reduced to rubbl…