It is reported the 9/11 Commission now believes that the hijackers used short knives instead of box cutters. The New York Observer comments, “Remember the airlines’ first reports, that the whole job was pulled off with box cutters? In fact, investigators for the commission found that box cutters were reported on only one plane [Flight 77]. In any case, box cutters were considered straight razors and were always illegal. Thus the airlines switched their story and produced a snap-open knife of less than four inches at the hearing. This weapon falls conveniently within the aviation-security guidelines pre-9/11.”
[New York Observer, 2/15/2004] It was publicly revealed in late 2002 that box cutters were illegal on 9/11. [Associated Press, 11/11/2002]