Humble, ever-smiling, and one of India’s most loved presidents, APJ Abdul Kalam was born on this day in 1931 in Tamil Nadu’s Rameswaram. Popularly known as India’s missile man, Kalam served as the 11th President of India. Kalam worked with the Defence Research and Development Organisation (DRDO) and Indian Space Research Organisation (ISRO) as a scientist and an administrator before becoming President of the country.