United States nuclear weapons program

United States nuclear weapons program
Agency name	United States nuclear weapons program
Picture caption	The first nuclear detonation, the Trinity test, in July 1945.

United States nuclear weapons program. The United States nuclear weapons program encompasses the research, development, testing, production, and command of the country's arsenal of nuclear warheads and delivery systems. Initiated during World War II under the Manhattan Project, it produced the first atomic bombs used in combat against Hiroshima and Nagasaki. Managed today by the Department of Energy and the Department of Defense, it maintains a strategic triad of delivery systems and is a cornerstone of NATO security policy.

History

The program originated with the Manhattan Project, a secret World War II effort led by scientists like J. Robert Oppenheimer and Leslie Groves at sites including Los Alamos, Oak Ridge, and the Hanford Site. This culminated in the Trinity test in New Mexico and the subsequent bombings of Hiroshima and Nagasaki. The post-war period saw the establishment of the Atomic Energy Commission and a fierce arms race with the Soviet Union, driven by events like the Soviet atomic bomb project and the Cuban Missile Crisis. Key developments included the hydrogen bomb tested during Operation Ivy and the strategic doctrines of Mutual Assured Destruction during the Cold War.

Development and production

Weapon design and primary nuclear component manufacturing is managed by the National Nuclear Security Administration within the Department of Energy. Key facilities include the Lawrence Livermore National Laboratory, Sandia National Laboratories, and the Kansas City National Security Campus. The Pantex Plant in Texas is responsible for final assembly, maintenance, and dismantlement of warheads. These laboratories and plants support the life extension programs for legacy systems like the B61 and W88 warheads, while also conducting research into potential future designs under the purview of the Stockpile Stewardship Program.

Stockpile and deployment

The active stockpile is deployed via the strategic triad: Intercontinental Ballistic Missiles (ICBMs) like the LGM-30G Minuteman III, Submarine-Launched Ballistic Missiles (SLBMs) aboard Ohio-class submarines, and strategic bombers such as the B-2 Spirit and B-52 Stratofortress. Tactical nuclear weapons, including the B61 gravity bomb, are forward-deployed in allied nations under NATO nuclear sharing arrangements. The total arsenal size is classified but is reported in aggregate data under treaties like New START, which is verified by the National Technical Means of the United States Intelligence Community.

Command and control

Absolute release authority resides solely with the President of the United States, communicated through the Nuclear Football and the Gold Codes. The primary military command for execution is the United States Strategic Command (USSTRATCOM). Orders are transmitted via hardened communication systems like the Minimum Essential Emergency Communications Network to launch crews in Malmstrom, F.E. Warren, and Minot Air Force Base, and to ballistic missile submarine commanders. This system is designed with multiple layers of physical and electronic security, including the Permissive Action Link (PAL) system on the weapons themselves.

Testing and non-proliferation

The United States conducted over 1,000 nuclear tests, primarily at the Nevada Test Site and the Pacific Proving Grounds, before ratifying the Comprehensive Nuclear-Test-Ban Treaty and instituting a moratorium in 1992. Current certification relies on the Stockpile Stewardship Program, using supercomputers at Lawrence Livermore National Laboratory and experiments at the National Ignition Facility. The nation is a signatory to key non-proliferation treaties including the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) and the New START treaty with Russia, and leads initiatives like the Nuclear Suppliers Group and the Proliferation Security Initiative.

Accidents and controversies

The program has experienced several serious incidents, known as Broken Arrows, including the 1966 Palomares B-52 crash over Spain and the 1968 Thule Air Base B-52 crash in Greenland. Domestic controversies include the health and environmental legacy of production sites like the Hanford Site and the Rocky Flats Plant, leading to major cleanup efforts under the Superfund program. Ethical and political debates have persisted since the Atomic bombings of Hiroshima and Nagasaki, through the MAD doctrine, to modern debates over modernization costs, the development of low-yield warheads like the W76-2, and compliance with the Treaty on the Prohibition of Nuclear Weapons.

Category:Nuclear weapons of the United States Category:Nuclear weapons programs