CNN The Situation Room December 4, 2013 23:05:00
It's usually transport indeed lead casing. mexican authorities say if it's removed from that. >> translator: the raid ag, gamma-rays in this case, is harmful and dangerous to your health. >> reporter: security officials have long been concerned that cobalt-60 cooling used by terrorists in a so-called dirty bomb like those seen in this simulation. i asked a homeland security expert if ache truck ball exploded at a crowded city corner -- >> damage the buildings, you'll have injuries and fatalities from the explosion. but the dirty ball, and it's a dirty ball, because it has about this much cobal...
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