On July 27, 2015 (June 12, 2015 in the lunar calendar), Kalam, former Indian President, passed away. Former Indian President Kalam passed away Kalam was born on October 15, 1931 to a Muslim family in the southern Indian state of Tamil Nadu. On July 27, 2015, he fainted due to a heart attack while giving a speech in the northeastern Indian city of Sloan. He died after being sent to hospital for emergency treatment. He was 84 years old. Indian politicians commented that as the first professional scientist elected as President of India, Kalam devoted his life to scientific research and ordinary people, inspiring a generation of Indians with his enthusiasm, concentration and diligence. India mourns for seven days, India's chief secretary of Meghalaya State Vargiri said that Kalam suddenly fell to the ground while giving a speech to students of the Indian Institute of Management in Sillong, the state capital, on the 27th. He was rushed to the hospital and died due to ineffective rescue efforts. After Kalam's death was heard, the Indian federal government announced that it would hold a state funeral for him and national mourning for seven days. Indian media reported that Kalam's body arrived in the capital New Delhi for burial yesterday morning (28th). Kalam was born on October 15, 1931, into a poor Muslim family in Tamil Nadu, southern India. He was the youngest child in his family. He liked reading since childhood. As a child, he sold newspapers to subsidize his family. In 1950, Karam was admitted to St. Joseph's College in India, and after graduation transferred to Madras Institute of Technology, specializing in aviation engineering, and received his doctorate with honors in 1958. Having never studied abroad, Karam always proudly calls himself "Made in India." In 1963, Karam was transferred to the Indian Space Research Organization for missile research because of his outstanding work. In the following decades, he and his colleagues continued to achieve technological breakthroughs. In 1980, India successfully launched the SLV-3 solid-fuel rocket for the first time, and Kalam served as the director of this scientific research project. In 1982, he went to work in the Indian Defense Research and Development Organization. He served as director of the Hyderabad Laboratory and director of the National Integrated Missile Launch Program. He led the ground-to-surface "Agni" medium and long-range missile and the "Priitvi" medium and short-range missile. Work on various missile research groups, and also served as director of the Indian Defense Research and Development Organization. As a missile expert, Kalam has always advocated that India should rely on its own to solve its own problems and is known as India's "father of missiles." In 1997, Kalam was awarded the country's highest honor, the Diamond Medal of India, and the following year became Prime Minister Vajpayee's chief scientific adviser. In July 2002, he was elected the 12th President of India, becoming the first professional scientist to be elected President of India and the third Muslim President of India. Kalam was never married. In an interview in 2006, he said that he had not seen a movie for 50 years because he spent most of his time reading scientific literature. Kalam even joked that he was "married" to scientific research, so he didn't have much time for entertainment."People wouldn't believe it, but it's really the truth." Not only does he build missiles, but he is also good at writing poetry. Kalam is not only an accomplished scientist, but also a poet. He has deep literary attainments and has written many poems. India's current President Pranab Mukherjee commented,"Kalam will be forever remembered for his passion for science and innovation and his contributions as a scientist, official, educator and writer." Indian Prime Minister Narendra Modi said Kalam's death was a major loss to the scientific community."He took India to new heights and charted the way for (India's scientific development)." Indian Home Minister Rajnath Singh's assessment was the most concise but most pertinent: "He inspired an entire generation. After stepping down as president in 2007, Kalam frequently appeared in major universities and remote schools in India, encouraging young students to bravely pursue their dreams through lectures. After leaving office, Kalam received hundreds of emails sent to him every day from young people, most of which sought advice from him, and the vast majority of them received replies. On July 28, Indian people commemorated former President Kalam