The credit that former prime minister A.B. Vajpayee reportedly gave this week to his predecessor P.V. Narasimha Rao for building India’s nuclear weapon programme was long overdue.Few obituaries to Rao have noted his role in preserving and expanding India’s nuclear options at a very crucial stage.Nor has there been much debate on why Rao chose to hold back in December 1995 after so painstakingly preparing the ground for the nuclear tests. Had Vajpayee acknowledged Rao’s contribution on May 11, 1998 when the first round of Pokhran-II took place, the ensuing domestic political division could have been avoided.Nor would there be reason today to discuss which government was responsible for pushing Indian nukes ‘‘out of the tube’’. The reality is that the Indian bomb was as much a project of the Congress as it was of the BJP.Jawaharlal Nehru for all his commitment to peace and disarmament refused to give up India’s right to make nuclear weapons. After the first Chinese test in October 1964, barely months after Nehru died, the Congress demanded the bomb in a resolution at the AICC session in Durgapur in 1965.Indira Gandhi conducted the first nuclear test in May 1974 but chose to call it a ‘‘peaceful nuclear explosion’’. It was Rajiv Gandhi who finally decided to make India a nuclear power in 1988.His successors, V.P. Singh and Chandrasekhar, are in a position to confirm Rajiv Gandhi’s decision having each received a paper on the state of India’s nuclear programme at the beginning of their tenures.The decision to go nuclear in 1988 was secret. The question after Rajiv Gandhi was when and how India would come out of the nuclear closet. Every nuclear programme faces its most dangerous moments in its initial phases. That precisely is what Rao confronted in 1991. The end of the Cold War and the international concerns on non-proliferation resulted in relentless pressures from the US to cap India’s nuclear programme. It’s his view, says Congress