I dare you to fetch this link (see page 39 — "So you may use iron pipes, pressure cookers, fire extinguishers, or empty propane canisters. The point is that the

I dare you to fetch this link (see page 39 — "So you may use iron pipes, pressure cookers, fire extinguishers, or empty propane canisters. The point is that the inflammable substance needs to be contained in a strong container that would allow the pressure to build up and thus cause a damaging explosion."): http://azelin.files.wordpress.com/2010/06/aqap-inspire-magazine-volume-1-uncorrupted.pdf http://azelin.files.wordpress.com/2010/06/aqap-inspire-magaz... That was authored by the AQ Chef, the late Anwar al-Awlaki, who was pressure-cooked by a Hellfire missile in 2011. His article supposedly guided the efforts of the Boston Marathon bombers.