text:  A reminder of our top story this hour, the US Secretary of State says much-awaited F-16 fighter jets are on their way to Ukraine as the second day of a pivotal NATO summit kicks off. Two days after Russian strikes shattered a children's hospital in Kiev and sparked international condemnation, NewsHour spoke to Victoria, who had to evacuate the hospital with her 12-year-old son while preparing to undergo surgery. We heard an air raid siren and then an explosion.