 Thank you very much, Tom. Tom Bateman reporting live from Washington. One of the reasons Ukraine is so concerned about its air defences is to prevent the kind of attack that occurred on Monday when 43 people were killed in missile attacks nationwide, including two people in a paediatric hospital in Kyiv. NewsHour's Julian Warwick has been speaking to Victoria Kolpakova, whose 12-year-old son was preparing for a stem cell transplant in the Kyiv hospital when the missile struck.