http://www.newyorker.com/fact/content/?030210fa_fact
THE UNKNOWN
by JEFFREY GOLDBERG
The C.I.A. and the Pentagon take another look at Al Qaeda and Iraq.
Recently, I asked two former C.I.A. directors, James Woolsey and Robert Gates, to talk about the problem of analyzing an incomplete set of evidence—the same challenge that stymied intelligence analysts in the days before December 7, 1941, and September 11, 2001.
Woolsey, who served as President Clinton's first C.I.A. director, said that it is now illogical to doubt the notion that Saddam collaborates with Islamist terrorism, and that he would provide chemical or biological weapons to Al Qaeda. "At Salman Pak"—a training camp near Baghdad—"we know there were Islamist terrorists training to hijack airplanes in groups of four or five with short knives," Woolsey told me. "I mean, hello? If we had seen after December 7, 1941, a fake American battleship in a lake in northern Italy, and a group of Asian pilots training there, would we have said, 'Well, you can't prove that they were Japanese'?"
http://www.jcpa.org/art/brief1-8.htm
However, according to the UN, Iraq's most effective biological weapons platform was a helicopter-borne aerosol generator that worked like an insecticide disseminator (perhaps this was intended for domestic use or against Iranian troops close to the Iraqi border). The disseminator was successfully field tested. Dispersal research for biological weapons was conducted by the Salman Pak Technical Research Center. Iraq engaged in genetic engineering research in order to produce antibiotic resistant strains of anthrax spores. The success of this research is unknown.
---------------------------------------------------
worked like an insecticide disseminator
Sounds like a crop duster. Some of the hijackers, who were possibly trained at Salman Pak, were very interested in crop dusters.