The trauma of childhood on the front lines of Ukraine's war

In eastern Ukraine, war with Russian-backed separatists has raged on and off for five years, forcing a generation of children to endure prolonged trauma and the premature loss of innocence. The film “The Distant Barking of Dogs” chronicles the story of 10-year-old Oleg and his grandmother, Aleksandra, who experience painful transformation along the conflict's front lines. Nick Schifrin reports.