SNIPPET: "Discussion: I first observed discussion of binary explosives on the al-Firdaws forum in January of 2007. In light of recent events I will post here my archive:" SNIPPET: "Implementation: On Christmas Day, 2009, Abdul Farouk Abdulmutallab boards a flight in Amsterdam, bound for Detroit, and on final descent he attempts to set off what was most likely a binary explosive. Thank goodness he either screwed up or had bad instructions, because the chemicals he was working with were evidently quite good."