A prospective Chinese MRBM force led INR to consider whether Beijing would believe that it had more freedom of action to step up its involvement in the Vietnam War: it “might feel freer in extending aid to Hanoi and becoming more involved in the war if US pressure on the North Vietnamese seemed to require it.”

Years before Beijing actually deployed an ICBM in 1981, US intelligence estimated the possibility of the deployment of a “few operable, though probably relatively inefficient missiles” as early as 1971.

The treaty creating the Latin American Nuclear Free Zone (LANFZ) was signed at Tlatelolco, Mexico, on 14 February 1967. Taking a close look at key provisions, INR found that the entry into force provisions included loopholes which “unenthusiastic” states could use so the treaty did not cover their territory.

The Swedish government rejected Supreme Commander Torsten Rapp’s proposals to fund a nuclear weapons program. This INR report from March 1967 on proposed cuts in defense spending suggested that the possibility that Sweden would acquire nuclear weapons had grown even more remote.