HYDERABAD: Telangana Chief Minister K Chandrasekhar Rao expressed his condolence over the death of former President of India Dr APJ Abdul Kalam. Apart from serving as a President, his service in other fields enhanced the prestige of the nation, stated Rao, adding that his death is an irrevocable loss to the nation. He recalled that Kalam, known as India’s ‘missile man’, pursued many research activities in the city.