To Google: “How to make a pressure cooker bomb,” for the record Wikipedia appeared first with the following description: “officially classified as an IED, improvised explosive device, ingredients, one J.C. Penney 5 quart pressure cooker, fresh gasket (or not), explosive material, (black powder, match heads, fireworks), add ignition.”
This the device used in Mumbai attack in 2006, 2010 in Stockholm and Times Square, and multiple locations since: Iraq, Afghanistan, and as we know, Boston.
According to the Latin Times, Dzhokhar Tsarnaev learned how to make the bomb from al-Qaeda’s online magazine “Inspire.”
The online photo is of a household variety pressure cooker with a handle, the kind used to make boiled dinner, to can beans and corn. The explosive is surrounded by ball bearings, or if you are feeling wicked, finishing nails, being without a head, they penetrate deeper.
The FBI found incendiary devices in the apartment of the younger Tsarnaev along with BBs. The explosive material is rumored to be “Buy 2 Get 1 Free” fireworks.
In related Google searches it was revealed how to make baked beans in a pressure cooker (instead of soaking over night), also popcorn, rice dhokla, khichdi pulao, raguna biryani. I have never made popcorn in a pressure cooker, to wonder why a pressure cooker?