![](https://bloximages.newyork1.vip.townnews.com/stltoday.com/content/tncms/assets/v3/editorial/7/11/711dd6c8-257b-11ee-a1dd-f3f565038954/64b7426c7be95.preview.jpg?crop=1761%2C925%2C0%2C126&resize=1200%2C630&order=crop%2Cresize)
Timeline: St. Louis’ long history of radioactive contamination
Mallinckrodt began processing uranium ore in St. Louis in 1942. Parts of St. Louis remain contaminated more than 80 years later. Here is a timeline of notable developments, including links to records and stories: 1939 — Albert Einstein urges President …