AS soon as Air-India One took off from Paris' Orly Airport, a tired but happy prime minister Atal Behari Vajpayee walked out of his suite to 'thank' the journalists who had accompanied him on the eight-day trip to New York and Paris. He was clearly satisfied with the visit. He said India had come a long way since the nuclear tests, and that there was a visible change in the way other countries viewed India. Now, the PM explained, opinion-makers accepted the fact that India needed to go nuclear because it had legitimate security concerns.