Development of nuclear weapon – Manhattan Project
The first nuclear weapon was produced in the United States during the 2nd World War within so called Manhattan Project, which took place in Los Almos National Laboratory in New Mexico. The Project was under the direction of Major General Leslie Groves of the U.S. Army Corps of Engineers, but actually the physicist Jacob Robert Oppenheimer, who was a director of Los Almos National Laboratory, invented the atomic bomb. On 16 July 1945 was conducted first test of the atomic bomb at New Mexico’s Alamogordo Bombing and Gunnery Range, which is located in a desert called White Sands near Alamogordo city.
Two different types of atomic bomb were developed within the project. The first one – gun-type weapon was made using uranium-235. The other one – implosion-type weapon was made using plutonium. The gun-type weapon was used to bomb Hiroshima on 6 August 1945 and the implosion-type weapon was used to bomb Nagasaki on 9 August 1945.
The Manhattan Project cost nearly 2 billion dollars and employed more than 130,000 people.