Dr. Avul Pakir Jainulabdeen Abdul Kalam ( 15 October 1931 - 27 July 2015) was Born and raised in Rameswaram, Tamil Nadu, Kalam studied physics and aerospace engineering. He served as the President of India from 2002 to 2007 and was awarded the nation's top civilian awards, including Padma Vibhushan, Padma Bhushan and Bharat Ratna.
Kalam spent four decades as a scientist and science administrator, at the Defence Research and Development Organisation (DRDO) and Indian Space Research Organisation (ISRO). He was the Chief Scientific Advisor to the Prime and the Secretary of the DRDO from 1992 to 1999. The Pokhran-II nuclear tests were conducted during this period.