<P> Bomb shafts were dug under camouflage netting and the dug - out sand was shaped like dunes . Cables for sensors were covered with sand and concealed using native vegetation . Scientists would not depart for Pokhran in groups of two or three . They travelled to destinations other than Pokhran under pseudonyms, and were then transported by the army . Technical staff at the test range wore military uniform, to prevent detection in satellite images . </P> <P> The main technical personnel involved in the operation were: </P> <Ul> <Li> Project Chief Coordinators <Ul> <Li> Dr. A.P.J. Abdul Kalam (later, President of India), Scientific Adviser to the prime minister and Head of the DRDO . </Li> <Li> Dr. R. Chidambaram, Chairman of the Atomic Energy Commission and the Department of Atomic energy . </Li> </Ul> </Li> <Li> Defence Research & Development Organization (DRDO) <Ul> <Li> Dr. K. Santhanam; Director, Test Site Preparations . </Li> </Ul> </Li> <Li> Atomic Minerals Directorate for Exploration and Research <Ul> <Li> Dr. G.R. Dikshitulu; Senior Research Scientist B.S.O.I Group, Nuclear Materials Acquisition </Li> </Ul> </Li> <Li> Bhabha Atomic Research Centre (BARC) <Ul> <Li> Dr. Anil Kakodkar, Director of BARC . </Li> <Li> Dr. Satinder Kumar Sikka, Director; Thermonuclear Weapon Development . </Li> <Li> Dr. M.S. Ramakumar, Director of Nuclear Fuel and Automation Manufacturing Group; Director, Nuclear Component Manufacture . </Li> <Li> Dr. D.D. Sood, Director of Radiochemistry and Isotope Group; Director, Nuclear Materials Acquisition . </Li> <Li> Dr. S.K. Gupta, Solid State Physics and Spectroscopy Group; Director, Device Design & Assessment . </Li> <Li> Dr. G. Govindraj, Associate Director of Electronic and Instrumentation Group; Director, Field Instrumentation . </Li> </Ul> </Li> </Ul> <Li> Project Chief Coordinators <Ul> <Li> Dr. A.P.J. Abdul Kalam (later, President of India), Scientific Adviser to the prime minister and Head of the DRDO . </Li> <Li> Dr. R. Chidambaram, Chairman of the Atomic Energy Commission and the Department of Atomic energy . </Li> </Ul> </Li>

Who was the president when first nuclear bomb tested