Innocuous as it is insidious, the pressure-cooker bomb has risen in prominence since 2001 both because of its effectiveness and the easy availability of its components.
It has turned up in attacks and foiled plots from Nepal to New York, but it was in 2004 when it caught the attention of the U.S. Department of Homeland Security. That year, the department issued a bulletin warning that the conversion of kitchen pressure cookers into improvised explosive devices was “a technique commonly taught in Afghan terrorist training camps.”
Since then, instructions on how to create such devices have been widely circulated online.
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