TOPSHOTS Indian school children pray during a condolence ceremony for former Indian President A.P.J. Abdul Kalam in Agartala, the capital of northeastern state of Tripura on July 28, 2015. India's former president and top scientist A. P. J. Kalam, who played a lead role in the country's nuclear weapons tests, died July 28, a hospital official said. He was 83. Kalam collapsed during a lecture at a management institute in the northeastern Indian city of Shillong, and was declared dead on arrival by doctors at Bethany hospital. AFP PHOTO/ ARINDAM DEY