USA HISTORY

Detailed explanation-1: -The Gun Site (TA-8-1) was where Manhattan Project scientists and engineers developed and tested the gun-type weapon design in Los Alamos, NM. The design for the Little Boy bomb dropped on Hiroshima on August 6, 1945, was developed here.

Detailed explanation-2: -In late 1941, the American effort to design and build an atomic bomb received its code name-the Manhattan Project. At first the research was based at only a few universities-Columbia University, the University of Chicago and the University of California at Berkeley.

Detailed explanation-3: -Scientists working under Oppenheimer had developed two distinct types of bombs: a uranium-based design called “the Little Boy” and a plutonium-based weapon called “the Fat Man.” With both designs in the works at Los Alamos, they became an important part of U.S. strategy aimed at bringing an end to World War II.

Detailed explanation-4: -Manhattan Project, U.S. government research project (1942–45) that produced the first atomic bombs. American scientists, many of them refugees from fascist regimes in Europe, took steps in 1939 to organize a project to exploit the newly recognized fission process for military purposes.