NATO member Poland says a Russian cruise missile briefly violated its airspace on Sunday morning. Warsaw summoned officials from the Russian embassy to demand an explanation. Poland said the missile entered its territory as it was firing at targets in western Ukraine. The city of Lviv, close to the Polish border, came under heavy attack. Explosions also rocked the Ukrainian capital. Officials say air defenses shot down roughly a dozen missiles in and around Kyiv. Residents were told to remain in shelters. Poland says it would have shot down the Russian missile that breached its airspace if there had been any indication that it was heading towards a target in Poland.Chapters:0:00 Russian missile in Polish airspace1:29 Marina Miron, Military Analyst, King’s College London