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The New York TimesWASHINGTON — The patient arrived in critical condition last month at the Bagram Air Base hospital in Afghanistan, with what American military doctors at first thought was an all too typical war injury: metal shrapnel from an improvised bomb lodged in his head.
A CAT scan revealed that the piece of metal, some two and a half inches long, was probably a bullet fragment — again, not at all unusual.
But as the patient, an Afghan soldier in his 20s, was prepared for surgery, the chief radiologist, Lt. Col. Anthony Terreri, took a closer look at the CAT scan. Stunned, he realized the object was an explosive round, primed to go off.
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http://www.nytimes.com/2010/04/10/world/asia/10military.html