What is APJ Abdul Kalam famous for? || Dr. A J P abdul kalam story

What is APJ Abdul Kalam famous for? || Dr. A J P abdul kalam storyAs Secretary of the DRDO from July 1992 to December 1999, Kalam played a major role in heading the Pokhran-II nuclear testing, leading to him being known as the best nuclear scientist of the country at that time. The nuclear testing under his supervision made India a nuclear-armed state