Question: Where were the explosive components of the weapon that detonated on Nagasaki, Japan on 8/9/145 made? 

Context articles: Fat Man
Project Camel
Nuclear weapon yield
United States and weapons of mass destruction
Salt Wells Pilot Plant
McDonald Ranch House
Critical Nuclear Weapon Design Information
Gravel Gertie
Nagasaki Kunchi
Nagasaki Atomic Bomb Museum

"Fat Man" was the codename for the atomic bomb that was detonated over the Japanese city of Nagasaki by the United States on 9 August 1945.
 It was the second of the only two nuclear weapons ever used in warfare, the first being Little Boy, and its detonation marked the third-ever man-made nuclear explosion in history.
 It was built by scientists and engineers at Los Alamos Laboratory using plutonium from the Hanford Site and dropped from the Boeing B-29 Superfortress "Bockscar".
 For the Fat Man mission, "Bockscar" was piloted by Major Charles W. Sweeney.
Project Camel was the codename given to work performed by the California Institute of Technology (Caltech) in support of the Manhattan Project during World War II.
 These activities included the development of detonators and other equipment, testing of bomb shapes dropped from Boeing B-29 Superfortress bombers, and the Salt Wells Pilot Plant, where explosive components of nuclear weapons were manufactured.
The explosive yield of a nuclear weapon is the amount of energy released when that particular nuclear weapon is detonated, usually expressed as a TNT equivalent (the standardized equivalent mass of trinitrotoluene which, if detonated, would produce the same energy discharge), either in kilotons (kt—thousands of tons of TNT), in megatons (Mt—millions of tons of TNT), or sometimes in terajoules (TJ).
 An explosive yield of one terajoule is 0.239 kt of TNT.
 Because the accuracy of any measurement of the energy released by TNT has always been problematic, the conventional definition is that one kiloton of TNT is held simply to be equivalent to 10 calories.
The United States is known to have possessed three types of weapons of mass destruction: nuclear weapons, chemical weapons, and biological weapons.
 The U.S. is the only country to have used nuclear weapons in combat, when it detonated two atomic bombs over the Japanese cities of Hiroshima and Nagasaki during World War II.
 It had secretly developed the earliest form of the atomic weapon during the 1940s under the title "Manhattan Project".
 The United States pioneered the development of both the nuclear fission and hydrogen bombs (the latter involving nuclear fusion).
 It was the world's first and only nuclear power for four years (1945–1949), until the Soviet Union managed to produce its own nuclear weapon.
 The United States has the second largest number of deployed nuclear weapons in the world, after Russia.
The Salt Wells Pilot Plant was a facility established by the Manhattan Project at the Naval Ordnance Test Station (NOTS) at Inyokern, California, where non-nuclear explosive components of nuclear weapons were manufactured.
 The first explosives were melted, mixed and poured on 25 July 1945.
 Between 1945 and 1954, it manufactured explosive components of the Fat Man, Mark 4, Mark 5 and Mark 12 nuclear bombs.
 The Salt Wells Pilot Plant also helped design, equip, and train workers for the Burlington AEC Plant in Iowa and the Pantex Plant in Texas.
 The Salt Wells Pilot Plant closed on 30 June 1954.
The McDonald Ranch House, also known as Trinity Site, in the Oscura Mountains of Socorro County, New Mexico, was the location of assembly of the world's first nuclear weapon.
 The active components of the Trinity test "gadget", a plutonium Fat Man-type bomb similar to that later dropped on Nagasaki, Japan, were assembled there on July 13, 1945.
 The completed bomb was winched up the test tower the following day and detonated on July 16, 1945 as the Trinity nuclear test.
Critical Nuclear Weapon Design Information (CNWDI, pronounced "SIN-widy") is a U.S. Department of Defense (DoD) category of Top Secret Restricted Data or Secret Restricted Data that reveals the theory of operation or design of the components of a thermonuclear or fission bomb, warhead, demolition munition, or test device.
 Specifically excluded is information concerning arming, fuzing, and firing systems; limited life components; and total contained quantities of fissionable, fusionable, and high explosive materials by type.
 Among these excluded items are the components that DoD personnel set, maintain, operate, test or replace.
 The sensitivity of DoD CNWDI is such that access is granted to the absolute minimum number of employees who require it for the accomplishment of assigned responsibilities on a classified contract.
 Because of the importance of such information, special requirements have been established for its control.
A Gravel Gertie is a type of bunker designed to provide containment during the nuclear weapons assembly process, when the plutonium or highly enriched uranium "pit" is mated with the high explosive components and wired into the electronics (the "physics package") of the warhead.
Kunchi (くんち ) , also Nagasaki Kunchi (長崎くんち ) or Nagasaki Okunchi (長崎おくんち ) , is the most famous festival in Nagasaki, Japan.
 It began as a celebration of autumn harvests in the late 16th century and became a shrine festival when Suwa Shrine was founded in 1642.
 Another purpose was to check for hidden Christians after the ban on Christianity.
 This is still evident today in the custom of "garden showing" (庭見せ , niwamise ) , when the presenting neighbourhoods open up their homes to public scrutiny.
 One of the most famous performances of the festival is the Dragon Dance which was originally performed on New Year's Eve by the Chinese residents of Nagasaki.
 Rehearsals for the festival begin on June 1.
 From October 7-9 the presentations of the festival, which vividly reflect Nagasaki's colourful history, spill over from the three festival sites into the streets and create an atmosphere of celebration throughout the city.
The Nagasaki Atomic Bomb Museum (長崎原爆資料館 , Nagasaki Genbaku Shiryōkan ) is in the city of Nagasaki, Japan.
 The museum is a remembrance to the atomic bombing of Nagasaki by the United States of America 9 August 1945 at 11:02:35 am.
 Next to the museum is the Nagasaki National Peace Memorial Hall for the Atomic Bomb Victims, built in 2003, which marks the hypocenter of the event.
 The bombing marked a new era in war, making Nagasaki a symbolic location for a memorial.
 The counterpart in Hiroshima is the Hiroshima Peace Memorial Museum.
 These locations symbolize the nuclear age, remind visitors of the vast destruction and indiscriminate death caused by nuclear weapons, and signify a commitment to peace.