Dr. Usmani peacefully died in Karachi on 17 June 1992 , and the occasion brought tears to the eyes of many scientists and reformers who regarded him with affection . In May 1998 , the Government of Pakistan belatedly recognised Usmani 's vital services by awarding the Pakistan 's highest civilian award , Nishan-i-Imtiaz posthumously by the prime minister Nawaz Sharif when Pakistan conducted its first successful nuclear tests
first successful nuclear tests
Chagai-I
Ishrat Hussain Usmani