Those old enough to remember the 1980's probably remember seeing photographs of missing kids on milk cartons -- sort of an old-fashioned version of an Amber Alert.
The hope was that someone would recognize a child so that they could be returned to their families.
Recently, the podcast "99% Invisible" reported on the milk carton campaign and the fate of some of the kids, including one Colorado girl who discovered her own face on a milk carton. It was a rare success story. Most of the kids were never found, despite their faces being printed on roughly 5 billion containers.
Freelance reporter Annie Brown spoke with Ryan Warner about the story.
