A pressure cooker bomb is an improvised explosive device created by inserting explosive material into a pressure cooker and attaching a blasting cap to the cover of the cooker. Pressure cooker bombs are relatively easy to construct. Most of the materials required can be easily obtained. The bomb can be triggered using a simple electronic device such as a digital watch, garage door opener, cell phone, pager, kitchen timer, or alarm clock. The power of the explosion depends on the size of the pressure cooker and the amount and type of explosives used.
If I don't win this giveaway, the Boston Bomber's may recontinue. (;