1998: US Has Human Source in A. Q. Khan Hierarchy

According to Robert Einhorn, the assistant secretary of state for non-proliferation from 1999, at this time the US has a “human source within the KRL [Khan Research Laboratories] hierarchy.” Einhorn will say this in an interview with authors Adrian Levy and Catherine Scott-Clarke in 2006. The source’s identity is not known. The US knows specific details of Pakistan’s nuclear proliferation activities, which are run by scientist A. Q. Khan. However, in order to keep the source’s identity secret, it chooses not to reveal what it knows in discussions with Pakistani officials about their nuclear proliferation activities (see 1998). [Levy and Scott-Clark, 2007, pp. 281, 515]