I can't understand why the Post-Gazette printed an illustration and the directions as to how to make a bomb by using a pressure cooker. You were very explicit in detail as to the "ingredients," i.e., nails, ball bearings, explosives, timer, blasting cap, etc. I don't think anyone needs to know this. Don't you realize that there are "copy cat," demented people who might try to made a bomb?
Going a step further, anyone planning to sell pressure cookers at garage sales, etc., should reconsider doing so.