The Science of DNA and the Art of Identification - WSJ.com

The Science of DNA and the Art of Identification - WSJ.com: "The type of test the U.S. government used to confirm it had killed Osama bin Laden has been widely used for decades in paternity disputes, criminal investigations and to identify remains after disasters. These genetic tests are well understood and generally reliable, but it can be tough to get a handle on what the results actually mean."