June 22, 2013 3:38 PM

Pa. Senator: ‘We have to be vigilant’ in fight to restrict chemicals used in IEDs

It’s called calcium ammonium nitrate, a substance with a Jekyll and Hyde nature. Used as a crop fertilizer, it helps feed people. But during the war against the Taliban, CAN produced in factories in Pakistan flowed into Afghanistan and became the primary ingredient in improvised explosive devices that killed or maimed hundreds of U.S. service members.

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