"A new Federation of American Scientists (FAS) report released Wednesday stated that "the greatest threat to Pakistan's nuclear infrastructure comes from jihadists both inside Pakistan and South and Central Asia."

The report, Anatomizing Non-State Threats to Pakistan's Nuclear Infrastructure, stated that "while there is appreciation of this danger, there are few substantive studies that identify and explore specific groups motivated and potentially capable of acquiring Pakistani nuclear weapons and/or fissile materials."

FAS said its new "report fills that gap by exploring the Pakistani Neo-Taliban (PNT) and the groups that fill its ranks."

Prepared by Charles Blair, director of the group's Terrorism Analysis Project, and Hans Kristensen, director of its Nuclear Information Project, discusses why the Pakistani Neo-Taliban is the most worrisome terrorist group that's capable of acquiring nuclear weapons. The report detailed new numbers for Pakistan's nuclear stockpile and developments in Pakistan's production of fissile materials."
Link to the FAS report. 164 pages. http://www.fas.org/pubs/_docs/Terrorism_Analysis_Report_1-lowres.pdf