The Missouri Independent, MuckRock and The Associated Press spent months combing through thousands of pages of previously-unreleased government records obtained through the Freedom of Information Act that show radioactive waste was known to pose a threat to people living near Coldwater Creek as early as 1949.
Federal officials repeatedly wrote off potential risks as “slight,” “minimal” or “low-level.”
Follow the timeline of how radioactive waste was moved across St. Louis:
