The Bundeskriminalamt (BKA), Germany’s federal anticrime agency, obtains a DNA sample for one of the 9/11 hijackers, alleged Flight 93 pilot Ziad Jarrah, after a search of the home of his girlfriend, Aysel Senguen. After the BKA sends the sample to the FBI, the bureau matches it with the DNA profile of one of four sets of unknown human remains recovered from the site in Shanksville, Pennsylvania, where Flight 93 crashed. According to an FBI report provided to the 9/11 Commission, presumably sometime between 2003 and 2004, no relatives of the alleged 9/11 hijackers provide the bureau with DNA samples for comparison. [Federal Bureau of Investigation, 2003]