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U.S. officials have confirmed that they have identified Osama bin Laden's body in Afghanistan with DNA tests, and reports say that they got the match from a grisly source: his dead sister’s brain. When bin Laden’s sister died from brain cancer a few years back in Boston, the FBI immediately put a warrant claim on her body so that it could later be used to identify the al Qaeda leader were he ever captured. ABC News reported that her brain was preserved and that both tissue and blood samples were taken from it to compile a DNA profile. In addition to the DNA samples, a national security official told CNN there were many confirmations of bin Laden's identity, including "facial recognition work."