How Ukrainians are searching for missing persons using AI and an army of families

Valentyna Ocheretnaya has never stopped looking for her combat medic son, missing in action for nearly three years. Ukraine is using innovative techniques to hunt for thousands like him.

​ Valentyna Ocheretnaya has never stopped looking for her combat medic son, missing in action for nearly three years. Ukraine is using innovative techniques to hunt for thousands like him. Read More Breaking News, Latest News and Videos | CNN