This article discusses the events surrounding the 9/11 bioterrorist attacks upon US citizens in which anthrax spores were utilized. The arguments presented in this article substantiate the shortcomings regarding the search of “domestic” terrorists, indicating that agents from the Arab world were involved in the organized attacks of sending letters with anthrax spores. Since the attacks employed the use of the weaponized aerosol form of anthrax, there is evidence which demonstrates that the manufacturing of the spores was carried out in a country with capabilities of developing bacteriological weapons. Special interest representatives reported results of the investigation regarding the sources of biological weapons, explaining the participants of the operation were localized. Ultimately, this article presents legitimate arguments in which further investigation is warranted.