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India began the Pokhran-II nuclear-weapons test, its first since the Smiling Buddha test 24 years earlier.

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Pokhran-II
1998 series of Indian nuclear weapons tests
Pokhran-II was a series of five nuclear weapon tests conducted by India in May 1998. The bombs were detonated at the Indian Army's Pokhran Test Range in Rajasthan. It was the second instance of nuclear testing conducted by India, after the first test, Smiling Buddha, in May 1974.Source: Wikipedia (CC BY-SA)
Nuclear weapons testing
Controlled detonation of nuclear weapons for scientific or political purposes
Nuclear weapons tests are experiments carried out to determine the performance of nuclear weapons and the effects of their explosion. Over 2,000 nuclear weapons tests have been carried out since 1945. Nuclear testing is a sensitive political issue. Governments have often…Source: Wikipedia (CC BY-SA)
Smiling Buddha
India's first successful nuclear weapons test (1974)
Smiling Buddha was the code name of India's first successful nuclear weapon test on 18 May 1974. The nuclear fission bomb was detonated in the Pokhran Test Range of the Indian Army in Rajasthan. As per the United States military intelligence, the operation was named as Happy…Source: Wikipedia (CC BY-SA)