This estimate updated an estimate (NIE-4-2-64) published in 1964 of the nuclear proliferation problem. That estimate, like this one, overestimated the likelihood of an Indian bomb, while somewhat underestimating Israelâs program. This assessment followed the same patternâpredicting India would produce a weapon within a âfew yearsâ and also putting Israel in the âmightâ category, although treating it as a âserious contenderâ nonetheless. Also following a short discussion of the âsnowball effectâ (later known as âproliferation cascadesâ or âchainsâ) suggesting that the United Arab Republic (Egypt-Syria) and Pakistan were likely to take the nuclear option should India or Israel go nuclear.