New Delhi| Prime Minister Narendra Modi has paid tribute to the famous scientist and former President of the country, Dr. APJ Abdul Kalam, known as ‘Missile Man’, on his birth anniversary. Recalling his contribution to the country as a scientist and a President, PM Modi said that he worked in sync with every section of the society. Paying tributes to Dr. Kalam on his birth anniversary, Prime Minister Narendra Modi tweeted, “Tributes to our former President Dr. APJ Abdul Kalam. Much appreciated for his contribution to our nation as a scientist and a President. who have harmonized with every section of the society.