APJ Abdul Kalam was born in 1931 in Tamil Nadu in a poor family. He excelled in his studies and earned degrees in aerospace engineering. He had a distinguished career working for DRDO and ISRO, where he played a key role in developing important defense projects like India's first satellite launch vehicle and the Agni missile. For his scientific achievements, he received many honors including India's highest civilian award, the Bharat Ratna. In 2002, he became the 11th President of India and was widely respected for his humility and commitment to public service.