Stolen Radioactive Material: What Is Iridium-192?

Some security experts are worried that a cache of radioactive material reportedly stolen from an oil field in Iraq could be used by organizations such as the Islamic State group to produce a dirty bomb. A laptop-size case with about 0.35 ounces (10 grams) of the material, called iridium-192, allegedly went missing from an oil field storage facility in Basra that is run by the American company Weatherford, Reuters reported. "We are afraid the radioactive element will fall into the hands of Daesh,