A secret group bought the ingredients for a dirty bomb — here in the U.S.

https://www.washingtonpost.com/world/national-security/a-secret-group-bought-the-ingredients-for-a-dirty-bomb--here-in-the-us/2016/08/03/46901c6e-58ae-11e6-9767-f6c947fd0cb8_story.html