Kyiv has recently suffered the most intense bombing it has seen since Russia began its full-scale invasion three years ago. What does Vladimir Putin hope to achieve — and how can the destruction be stopped?

Russia ratcheted up air attacks by drones and missiles on Ukraine this week. The increase comes as President Trump has expressed frustration at Russian President Vladimir Putin's seeming unwillingness to enter talks to end the war.

Russia fired more than 620 drones and long-range missiles overnight killing four people, Ukraine said Saturday, calling for fresh sanctions on Moscow to halt its record barrages.On Friday, Ukrainian drone and shelling attacks killed three people in Russia.