A third intelligence official said the recent interrogations of Al Qaeda members had provided important leads.
In the most recent interrogations, Khan has provided information on Iran's weapons design and its time line for building a bomb.
Despite the political furor over reading terrorism suspects their Miranda rights, it is not clear that doing so has had a major impact on recent interrogations.
The new advisory comes a week after the department warned of the possibility of hijacking attempts by Al Qaeda based largely on recent interrogations of a captured Qaeda terrorist.
Iraq acknowledged having stockpiles of chemical and biological weapons after the Persian Gulf war of 1991 but maintained that it destroyed all such weapons after that conflict, a position that Iraqi officials in American custody are said to have reiterated in recent interrogations.
The Justice Department is trying to salvage the case against Mr. Moussaoui in light of several setbacks, including recent interrogations of captured Qaeda leaders who have suggested that Mr. Moussaoui had nothing to do with the planning or execution of the Sept. 11 terror attacks, officials said.
Protest leaders and civil rights advocates who have monitored the recent interrogations said they believed at least 40 or 50 people, and perhaps many more, had been contacted by federal agents about demonstration plans and possible violence surrounding the conventions and other political events.
Bush administration officials have acknowledged that Mr. bin al-Shibh, who was apprehended last year in Pakistan, and other captured Qaeda figures have suggested in recent interrogations that Mr. Moussaoui was not involved in the Sept. 11 attacks but was sent to the United States on a different mission.
Recent genomic interrogation of large numbers of HGSOC patient samples indicated high complexity in terms of genetic aberrations, intra- and intertumor heterogeneity and underscored their lack of targetable oncogenic mutations.
