CNN Anderson Cooper Special Report April 27, 2013 05:39:00
Ordinary pressure cookers bought at a department store. packed with nails and ball bearings to cause maximum carnage. >> all of the equipment used was probably under a hundred dollars. >> where would two brothers in ston learn how to take a pressure cooker like this and make it into a bomb like that. right here, of course. it's on the internet. >> the striking similarity between the boston devices and the recipe in the summer of 2010. how to build a bomb in your mom's kitchen. >> now, these similarities are low grade explosive powder. but, also, very specific stuff like the fact that in spy