Students, staff and members of the faculty of the Indian Institute of Science pay a candle light tribute to former Indian president A.P.J. Abdul Kalam in Bangalore on July 28, 2015. Kalam, who played a lead role in the country's nuclear weapons tests, died July 28, a hospital official said. He was 83. AFP PHOTO/Manjunath KIRAN        (Photo credit should read MANJUNATH KIRAN/AFP/Getty Images)