Boston bombs 'packed nails inside pressure cookers'
How Do Pressure Cooker Bombs Work?
Pressure-cooker bombs suspected in Boston blast | Members | heraldandnews.com
Why Use A Pressure Cooker To Build A Bomb? : The Two-Way : NPR
A history of pressure cooker bombs | CBC News
How A Pressure Cooker Bomb Works [Infographic] | Popular Science
Inert Pressure Cooker IED | DSA Detection Part Number CED0076
Hey, Dave! on Twitter: "@cnni This shows a pressure cooker IED with a cell phone attached to the blasting cap or initiator. If you use a timer, not a cell phone, then
CAT-UXO - Pressure cooker bomb main charge
IED expert talks about pressure cooker bombs
Pressure-cooker bomb used in Chelsea seen in other US attacks