The top secret
National Intelligence Estimate did not mince words. The United States faced an enemy with “no scruples about employing any weapon or tactic,” it said, and
nuclear weapons
smuggled across porous borders threatened to devastate American cities.
Sleeper cells, the document warned, might already be inside the
country.
1 Comments in Response to Dusting Off Nuclear Fear For Terrorists
Read the documents for yourself:
http://documents.nytimes.com/declassified-cold-war-documents-show-familiar-worries-over-nuclear-weapons