The Armed Forces DNA Identification Laboratory (AFDIL) publishes a report on the examination of DNA of the presumed hijackers of Flight 77, which hit the Pentagon on 9/11, and Flight 93, which went down near Shanksville, Pennsylvania. The hijackers’ DNA is identified by a process of elimination, i.e. it is presumed to be that which does not match the samples provided by the passengers’ relatives. Samples are not requested from the hijackers’ families (see After September 11, 2001), but it is determined that the DNA may have come from Middle Eastern men, although in two cases current but not very comprehensive databases indicate they are more likely to come from Europeans. Also, the DNA samples from the Pentagon indicate that two of the presumed hijackers may well have been brothers. Presumably this refers to Nawaf and Salem Alhazmi. [Armed Forces DNA Identification Laboratory, 1/2004, pp. 82-84 ]