Ukraine - Russia war: Polish citizens prepare for war

In Poland, residents near the Ukrainian border have grown more alert to the threat of aerial attacks since September 9th, when about 20 Russian drones violated Polish airspace. Three days later, as air raid sirens sounded across eastern Poland, people in Chełm (Helm) were unsure how to respond. Since then, the town council has begun organizing drills to prepare citizens for a potential strike. Adrien Sarlat and Gulliver Cragg report.