The Department of Homeland Security in 2010 warned about terrorists using pressure cookers in bombings in Afghanistan, India, Nepal and Pakistan, Fast Company reports .
Surgeons who worked on the victims found large pellets, small BBs and headless nails that were stuffed in six-liter pressure cookers.
The department sent letters to law enforcement officials nationwide warning about the pressure cookers.
“IEDs represent the most ubiquitous threat to our nation for those intent on conducting physical attacks. Law enforcement and the private sector need tools to provide the capability to prevent such incidents,” Robert Liscouski of Implant Sciences  told Fast Company.
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