Some of the bombs shown were labeled ETN [0], likely erythritol tetranitrate [1] 0: https://ktla.com/wp-content/uploads/sites/4/2024/12/FBI-pipe-bomb-seizure-4

Some of the bombs shown were labeled ETN [0], likely erythritol tetranitrate [1] 0: https://ktla.com/wp-content/uploads/sites/4/2024/12/FBI-pipe-bomb-seizure-4.jpg https://ktla.com/wp-content/uploads/sites/4/2024/12/FBI-pipe... 1: https://en.wikipedia.org/wiki/Erythritol_tetranitrate https://en.wikipedia.org/wiki/Erythritol_tetranitrate