WORLD HISTORY

Detailed explanation-1: -On 29 August 1949, the Soviet Union secretly conducted its first successful weapon test (First Lightning, based on the American “Fat Man” design) at the Semipalatinsk-21 in Kazakhstan. Stalin alongside Soviet political officials and scientists were elated at the successful test.

Detailed explanation-2: -The Soviet Union explodes a nuclear weapon code-named “First Lightning” in Semipalatinsk, Kazakhstan, becoming the second country to develop and successfully test a nuclear device.

Detailed explanation-3: -The Semipalatinsk Test Site (Russian: -21; Semipalatinsk-21), also known as “The Polygon", was the primary testing venue for the Soviet Union’s nuclear weapons. It is located on the steppe in northeast Kazakhstan (then the former Kazakh SSR), south of the valley of the Irtysh River.

Detailed explanation-4: -The world’s first nuclear explosion occurred on July 16, 1945, when a plutonium implosion device was tested at a site located 210 miles south of Los Alamos, New Mexico, on the plains of the Alamogordo Bombing Range, known as the Jornada del Muerto. The code name for the test was “Trinity."

Detailed explanation-5: -On November 22, 1955, the Soviet Union exploded its first true hydrogen bomb at the Semipalatinsk test site.