Nuclear technology the element plutonium possesses an isotope that is sufficiently unstable for this process to be usable. Terrestrial plutonium does not currently occur naturally in sufficient quantities for such use, so it must be manufactured in a nuclear reactor. Ultimately, the Manhattan Project manufactured nuclear weapons based on each of these elements. They detonated the first nuclear weapon in a test code-named "Trinity", near Alamogordo, New Mexico, on July 16, 1945. The test was conducted to ensure that the implosion method of detonation would work, which it did. A uranium bomb, Little Boy, was dropped on the Japanese city Hiroshima on
B41 nuclear bomb B41 nuclear bomb The B-41 (also known as Mk-41) was a thermonuclear weapon deployed by the United States Strategic Air Command in the early 1960s. It was the most powerful nuclear bomb ever developed by the United States, with a maximum yield of 25 megatons. The B-41 was the only three-stage thermonuclear weapon fielded by the U.S. The development of the B-41 began in 1955 with a USAF requirement for a Class B (high-yield, over ) weapon. It was based on the "Fagotti (bassoon)" test device first fired in the Redwing Zuni test of 27 May 1956. An ICBM warhead