History of the United States 6–3 decision in Korematsu v. United States Supreme Court case. Research and development took flight as well, best seen in the Manhattan Project, a secret effort to harness nuclear fission to produce highly destructive atomic bombs. From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the U.S. Army Corps of Engineers. Nuclear physicist J. Robert Oppenheimer was the director of the Los Alamos Laboratory that designed the actual bombs. The first nuclear device ever detonated was an implosion-type bomb at the Trinity test, conducted at New Mexico's Alamogordo Bombing and Gunnery Range on
Riazuddin (physicist) preferred to use the scientific research rationale. The Theoretical Physics Group began its research and directly reported to Abdus Salam. In 1977 both MPG and TPG scientists completed the design and calculation of an atomic bomb. Along with Qadir, Riazuddin continued to develop the theoretical designs of the atomic weapon during 1978. In 1982 the PAEC finally developed the device under the leadership of Munir Ahmad Khan. The PAEC carried out the first cold-test of the TPG's theoretical design by May 1983 at Kirana Hills. The test teams were headed by Ishfaq Ahmad, a nuclear physicist, and Munir Ahmad Khan