<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> <P> Three laboratories of the DRDO were involved in designing, testing and producing components for the bombs, including the advanced detonators, the implosion and high - voltage trigger systems . These were also responsible for weaponising, systems engineering, aerodynamics, safety interlocks and flight trials . The bombs were transported in four Indian Army trucks under the command of Colonel Umang Kapur; all devices from BARC were relocated at 3 am on 1 May 1998 . From the Chhatrapati Shivaji International Airport, the bombs were flown in an Indian Air Force's AN - 32 plane to the Jaisalmer army base . They were transported to Pokhran in an army convoy of four trucks, and this required three trips . The devices were delivered to the device preparation building, which was designated as' Prayer Hall' . </P>

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