answers: Dr. Abdul Kalam
context: devices were detonated, and the Indian government led by Prime Minister Atal Bihari Vajpayee shortly convened a press conference to declare India a full-fledged nuclear state. The tests resulted in a variety of sanctions against India by a number of major states, including Japan and the United States. Many names have been assigned to these tests; originally these were collectively called "Operation Shakti–98", and the five nuclear bombs were designated "Shakti-I" through to "Shakti-V". More recently, the operation as a whole has come to be known as "Pokhran II", and the 1974 explosion as "Pokhran-I". Efforts towards building the nuclear </s> to ensure total secrecy." Extensive planning was done by a very small group of scientists, senior military officers and senior politicians to ensure that the test preparations would remain secret, and even senior members of the Indian government didn't know what was going on. The chief scientific adviser and the Director of Defence Research and Development Organisation (DRDO), Dr. Abdul Kalam, and Dr. R. Chidambaram, the Director of the Department of Atomic Energy (DAE), were the chief coordinators of this test planning. The scientists and engineers of the Bhabha Atomic Research Centre (BARC), the Atomic Minerals Directorate for Exploration and </s> the nuclear program slowed down when Vikram Sarabhai became its head and little interest of Prime Minister Lal Bahadur Shastri in 1965. After Indira Gandhi became Prime Minister in 1966, the nuclear program was consolidated when physicist Raja Ramanna joined the efforts. Another nuclear test by China eventually led to India's decision toward building nuclear weapons in 1967 and conducted its first nuclear test, Smiling Buddha, in 1974. Responding to Smiling Buddha, the Nuclear Suppliers Group severely affected the India's nuclear program. The world's major nuclear powers imposed technological embargo on India and Pakistan, which was technologically racing to meet
question: who was indian president when first nuclear test were conduct