Security briefings suggest that jihadi groups are also close to producing "workable and efficient" biological and chemical weapons that could kill thousands if unleashed in attacks on the West.
At a Nato meeting in January 2009, security chiefs briefed member states that al-Qaida was plotting a program of "dirty radioactive IEDs", makeshift nuclear roadside bombs that could be used against British troops in Afghanistan. As well as causing a large explosion, a "dirty bomb" attack would contaminate the area for many years.
The briefings also state that al-Qaida documents found in Afghanistan in 2007 revealed that "greater advances" had been made in bioterrorism than was previously realized. An Indian national security adviser told American security personnel in June 2008 that terrorists had made a "manifest attempt to get fissile material" and "have the technical competence to manufacture an explosive device beyond a mere dirty bomb".
Tomihiro Taniguchi, the deputy director general of the IAEA, has privately warned America that the world faces the threat of a "nuclear 9/11" if stores of uranium and plutonium were not secured against terrorists.