A pressure cooker bomb is an improvised explosive device (IED) created by inserting explosive material into a pressure cooker and attaching a blasting cap into the cover of the cooker.
Pressure cooker fragment believed by the FBI to be part of one of the explosive devices used in the 2013 Boston Marathon bombings
Pressure cooker
Justice Department diagram showing positioning of pressure cooker in Faisal Shahzad's vehicle in New York’s Times Square bombing
Improvised explosive device
An improvised explosive device (IED) is a bomb constructed and deployed in ways other than in conventional military action. It may be constructed of conventional military explosives, such as an artillery shell, attached to a detonating mechanism. IEDs are commonly used as roadside bombs, or homemade bombs.
Ammunition rigged for an IED discovered in Baghdad by the Iraqi Police during November of 2005
A U.S. Cougar which was struck by an approximately 90–136 kg (198–300 lb) directed charge IED during the Anbar campaign. The crew of the MRAP survived uninjured due to the vehicle's multiple blast protection features.
Artillery shells and gasoline cans discovered in the back of a pick-up truck in Iraq
A U.S. Marine in Iraq shown with a robot used for disposal of buried devices