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
1947–50 in the Vietnam War and foreign affairs. The Accord was denounced by Ho Chi Minh and generated little support in Vietnam. Bảo Đại returned to Vietnam as Head of State after the agreement was formally approved by the French parliament. At a Department of State conference, Consul General George M. Abbott said that the only alternatives to a Bảo Đại government were a colonial war or a communist-dominated government of Vietnam. The Soviet Union detonated a nuclear bomb at a test site, breaking the United States' monopoly on nuclear weapons. The Soviet nuclear test amplified fears by the U.S. and its allies that the