This Is What A 'Pressure-Cooker Bomb' Looks Like

One of the bombs used in Monday's terrorist attack on Boston was reportedly stuffed into a pressure cooker. Here's how one war correspondent describes "pressure-cooker bombs," which are commonly used in Afghanistan:

Havin dealt with these IEDs myself, can say pressure cookers are the most easy-to-make improvised bombs, possible to make with minimum tools

— LT Mustafa Kazemi (@combatjourno) April 16, 2013

Here's a more detailed explanation of a pressure-cooker bomb from the Department of Homeland Security:

via DoD

(h/t Kalashnikitty)