India's former president and top scientist A. P. J. Kalam, who played a lead role in the country's nuclear weapons tests, died on 28 July. He was 83. Kalam collapsed during a lecture at a management institute in the north-eastern Indian city of Shillong, and was declared dead on arrival by doctors at Bethany hospital. On 30 July, Indian prime minister Narendra Modi and other top leaders paid last tribute to the Missile Man of India.

Indian prime minister Narendra Modi pays his last respects at the body of former Indian president APJ Abdul Kalam at Palam Airforce Station in New Delhi on July 28, 2915, after its arrival from Guwahati. 

Indian army personnel salute as the body of former Indian president, APJ Abdul Kalam is transported from Palam Airforce Station to his residence in New Delhi on July 28, 2915, after its arrival from Guwahati. 

Indian army, air force and navy officers carry the body of former Indian president, APJ Abdul Kalam at Palam Airforce Station in New Delhi on July 28, 2915, after its arrival from Guwahati.

Students of the University of Jammu pay tribute to former Indian president APJ Abdul Kalam in Jammu on July 28, 2015. 

In this photograph received from the Presidential Palace on July 28, 2015, Indian president Pranab Mukherjee pays his last respects at the body of former Indian President APJ Abdul Kalam at Palam Airforce Station in New Delhi on July 28, 2915, after its arrival from Guwahati.

 Indian President Pranab Mukherjee (L) and Prime Minister Narendra Modi walk past the body of former Indian President APJ Abdul Kalam at Palam Airforce Station in New Delhi on July 28, 2915, after its arrival from Guwahati. 

Indian Prime Minister Narendra Modi lays a wreath at the body of former Indian President APJ Abdul Kalam at Palam Airforce Station in New Delhi on July 28, 2915, after its arrival from Guwahati.