[tortoise]

He tried to buy Ammonium Nitrate as well. Do you think that choice suggests something too? I don't know anything about explosives.

Ammonium nitrate is generally pretty difficult to work with in the sense that it is very hard to get a sustained detonation without the proper setup and a little competence. While very popular in the mindshare of the public, it is quite a bit safer in that rank amateurs will have a hard time getting results out of it. TATP is much, much easier for an amateur to deploy successfully.

[Americanwolfsbrother]

Ammonium nitrate is generally pretty difficult to work with in the sense that it is very hard to get a sustained detonation without the proper setup...

Unless you let the mixture sit around to long, then the slurry can become very unstable.AWB