This is a very simple explosive to make at home, a quick trip to a hardware store and a beauty salon will get you the few ingredients you need. In its pure, unplasticized form it is simple to mix up, but very sensitive... The burn speed makes gunpowder look like an oily rag.

I do not know what it takes to make it into a weapon- and its probably best not to speculate in public... I once as a kid ignited a tablespoon of TATP that was in an unconfined pile... it went off with a 'WHOOMP' that you could feel in your chest...

TATP is a terrorist favorite because of its ease of manufacture- This sounds like not a huge amount of money was needed to finance this act....