America under attack with prion weapon of mass

Encouraged by the impact of the 9/11 events and the recent economic crunch which they believe has greatly weakened America, they have concluded that if a third coup de gras is inflicted on it will this time put an effective end to its dominant role in the international arena. A rich Gulf Arab Sheikh who hates U.S policies in the Middle East and the Muslim world wants, perhaps with the help of a terrorist group such as al-Qaeda, to attack the lifeline that made the United States military what it is today, rather than engaging it directly. So assisted by an international criminal group, he was able to recruit some European biological scientists whom he lured with generous sums to go with him to a fictitious African country named Zebrawana that typifies the well-known corrupt sub-Saharan African countries ruled by autocratic regimes. In his farm there, away from western prying eyes, they helped him develop a biological weapon of mass destruction which he subsequently succeeded in smuggling and propagating it secretly around some vital and important centers in the United States with the intention of killing as many scientists as possible. Will he or they succeed to achieve what they intend to, and are we prepared for a totally-new type of weapon that we may have not heard of before?