The information in the chart below (and some of the numbers cited in the text) comes from a report compiled in late 2013. Some of the numbers have since changed, slightly, but the information about delivery systems and other information remains accurate.  If you would like to contribute to this compilation, please see our projects page.

The chart below shows an estimate of the current American stockpile in detail. Dates for upgrades are those previously carried out or those planned as part of the National Nuclear Security Administration (NNSA) 3+2 modernization plan, or by the Defense Department.  The numbers on the chart are estimates produced from multiple, conflicting sources. Overall, the United States stockpile consists of approximately 2,150 deployed warheads, with another 2,650 in reserve, for a total of 4,650 (Kristensen and Norris 2013). In addition, there are another 3,000 or so warheads awaiting dismantlement.

The current U.S. modernization plan, in addition to revitalizing the nuclear weapons research, development, and production infrastructure, envisions replacing the existing arsenal with three ballistic missile warheads and two air delivered systems (NNSA 2014). This would essentially maintain the present arsenal shown below. The NNSA is the division of the Department of Energy that builds and maintains American nuclear warheads for the Department of Defense (DoD). Launch vehicles and platforms are the purview of the DoD.   

On the launch vehicle and delivery system front, the Air Force and Navy are both pursuing modernization programs that seek to replace or upgrade existing systems. Minuteman III missiles have undergone consistent improvements since their initial fielding, and current plans seek to upgrade all existing ICBMs planned for retention under New START by 2020. The Ohio Class submarines of the U.S. Navy will also require replacement between 2027 and 2040. Current plans call for a new boat, currently in the design phase to replace them (O’Rourke 2013).

The B-52 continues its 60-plus years of service, and continues to undergo upgrades. It is currently the only aircraft in the inventory able to carry nuclear cruise missiles. The B-2 bombers designated for the nuclear mission are not capable of carrying cruise missiles, only B-61s, a capability they share with F-16s and planned F-35s in the tactical role. There are no current plans for replacing either the B-52 or the B-2 in the nuclear role.

The Air Force is working with the NNSA on a B61 Life Extension Program (LEP) that consolidates and improves the B61 air dropped nuclear bomb. This program is controversial, and has several hurdles to overcome, political and technical. If the current plan supported it would effectively eliminate tactical nuclear weapons from U.S. arsenals (SOURCE?). Likewise, there are plans to modernize other warheads as part of the 3+2 concept, though that remains a moving target. Due to sequester and Congressional opposition to some of the modernization programs, which come with a steep price tag, NNSA has deferred some of the modernization programs to future budget years (NNSA 2013). Even with full funding, the majority of the stockpile will not complete modernization until after New START sunsets.

The United States has reduced or eliminated most of its non-strategic weapons. The only remaining deployed non-strategic weapons are the ninety or so B61-3 and B61-4 warheads deployed in Europe and Turkey. Portions of this deployed stockpile are for NATO allied use, though they remain in U.S. control. Several non-nuclear NATO allies maintain Dual Capable Aircraft (DCA) that can carry these B61 bombs. Most important of these is Turkey, where the U.S. deploys almost a third of these nuclear weapons.

The role of nuclear weapons within NATO remains a divisive and contentious issue within the alliance. The recent Lisbon conference in 2012 was unable to resolve the differences, despite a push by several nations, led by Germany, to remove those weapons from their territory. Problematic for the alliance is the role of the Turkey. The B61s at Injilik help contain Turkish nuclear ambitions and might play a role in deterring a nuclear Iran. 

The United States, like Russia, never declared the extent of its non-strategic stockpile, but agreements between President George H.W. Bush and Gorbachev in 1991 unilaterally and significantly reduced non-strategic weapons in Europe (Nichols, et al. 2012). The United States has effectively abandoned the tactical role for nuclear weapons, both physically and doctrinally. The 2010 Nuclear Posture Review (NPR) enunciates a view that places nuclear weapons solely in a deterrence role, and limits that deterrence. The Russian view is significantly different. These divergent views of non-strategic weapons represent a reversal of Cold War doctrines, when NATO and the United States perceived their own conventional force weakness and sought to implement tactical nuclear weapons as a check on the Soviet Union.

SOURCES:

Bernhow, Mark A. 2005. US Strategic and Defensive Missile Systems 1950-2004. University Park, IL: Osprey Publishing Limited.

Black, Ian. 2013. “Iran nuclear deal: Saudi Arabia and Gulf react with caution.” The Guardian. November 24. http://www.theguardian.com/world/2013/nov/24/iran-nuclear-deal-middle-east-reaction-saudi-arabia (November 26, 2013).

Blank, Stephen J., ed. 2010. Russian Military Politics and Russia’s 2010 Defense Doctrine. Carlisle, PA: Strategic Studies Institute.

_____. 2011. Russian Nuclear Weapons: Past, Present, and Future. Carlisle, PA: Strategic Studies Institute.

Butler, Desmond. 2012. “Obama faces bumps with Russian Policy.” Associated Press November 12.  http://hosted2.ap.org/ORBEN/1e38c7a90bbb42c9bda8ea8c454a5424/Article_2012-11-12-US-Russia-Analysis/id-5256ddc8489a4bb6b02015f594319eb7 (November 24, 2012)

Cimbala, Stephen J. 2008. Shield of Dreams: Missile Defense and U.S.-Russian Nuclear Strategy. Annapolis, MD: Naval Institute Press.

Cimbala, Stephen J. and Peter Rainow. 2007. Russia and Postmodern Deterrence: Military Power and Its Challenges for Security. Washington, D.C.: Potomac Books.

Diakov, Anatoly S. 2011. Verified Reduction of Non-Strategic Nuclear Weapons. http://www.armscontrol.ru (November 29, 2013).

Federation of American Scientists (FAS). 2013. “Russia/Soviet Nuclear Forces Guide.” http://www.fas.org/nuke/guide/russia (November 25, 2013).

_____. 2013. “U.S. Nuclear Forces Guide.” http://www.fas.org/nuke/guide/usa (November 27, 2013).

Friedber, Aaron L. 2000. In the Shadow of the Garrison State: America’s Anti-Statism and Its Cold War Grand Strategy. Princeton: Princeton University Press.

Giles, Keir, and Centre Conflict Studies Research.  2011.  The State of the NATO-Russia Reset. Oxford: Conflict Studies Research Centre.

Hildreth, Steven A., and Carl Ek. 2010.  "Missile Defense and NATO's Lisbon Summit.” Washington, D.C.: Congressional Research Service.

Hildreth, Steven A., and Amy F. Woolf. 2010.  "Ballistic Missile Defense and Offensive Arms Reductions: A Review of the Historical Record.” Washington, D.C.: Congressional Research Service.

Kristensen, Hans M. and Robert S. Norris. 2013. “US nuclear forces, 2013.” Bulletin of Atomic Scientists 69(2): 77–86.

_____. 2013. “Russian nuclear forces, 2013.” Bulletin of Atomic Scientists 69(3): 71–81.

Mamontov, Sergei. 2013. “Russia Skeptical Over Obama’s New Nuclear Reduction Proposal.” RIA Novosti. June 19. http://en.ria.ru/russia/20130619/181755868.html (November 22, 2013).

Mankoff, Jeffrey. 2012. Russian Foreign Policy: The Return of Great Power Politics. Lanham, MD: Rowman & Littlefield Publishers.

Msyanikov, Yevgeny. 2013. “On the role of nuclear weapons in international politics and in the security of Russia and its allies.” Speech at the International Summer School of the PIR Center on Global Security. July 3. Google translation. http://www.armscontrol.ru/pubs/ em070313.html (November 25, 2013).

Nichols, Tom, Douglas Stuart, and Jeffrey D. McCausland, eds. 2012. Tactical Nuclear Weapons and NATO. Carlisle, PA: Strategic Studies Institute.

Obama, Barack. 2013. “Remarks by President Obama at the Brandenburg Gate – Berlin, Germany.” The White House Office of the Press Secretary. June 19. http://www.whitehouse.gov/the-press-office/2013/06/19/remarks-president-obama-brandenburg-gate-berlin-germany (November 25, 2013).

O’Rourke, Ronald. 2013. Navy Ohio Replacement (SSBN[X]) Ballistic Missile Submarine Program: Background and Issues for Congress. Washington, D.C.: Congressional Research Service.

Peoples, Columba. 2010.  Justifying Ballistic Missile Defence Technology, Security, and Culture. Cambridge; New York: Cambridge University Press.

Pifer, Steven and Michael E. O’Hanlon. 2012. The Opportunity: Next Steps in Reducing Nuclear Arms. Washington, D.C.: Brookings Institute Press.

Podvig, Pavel. 2001. Russian Strategic Nuclear Forces. Cambridge: The MIT Press.

Rhodes, Richard. 1986. The Making of the Atomic Bomb. New York: Simon and Schuster.

Samson, Victoria. 2010.  American Missile Defense: A Guide to the Issues. Santa Barbara, Calif.: Praeger.

Schneider, Mark B. 2012. “Russian Nuclear Modernization.” Talking Points from speech to Air Force Association. June 20. Washington, D.C.: National Institute for Public Policy.

Stockholm International Peace Research Institute (SIPRI). 2013. SIPRI Yearbook 2013: Armaments, Disarmament and International Security. Oxford: Oxford University Press.

Sauer, Tom. 2011.  Eliminating Nuclear Weapons: The Role of Missile Defense. New York: Columbia University Press.

Segal, Gerard. 2002. “Strategic Nuclear Missiles, Warheads, and Throw-Weights of United States and USSR, 1964-82.” Brezhnev Reconsidered. New York: Palgrave Macmillan.

Sokolski, Henry D., ed. 2012. The Next Arms Race. Carlisle, PA: Strategic Studies Institute.

Sutyagin, Igor. 2012. Atomic Accounting: A New Estimate of Russia’s Non-Strategic Nuclear Forces. London: Royal United Services Institute for Defence and Security Studies.

Trenin, Dmitri. 2005. Russia’s Nuclear Policy in the 21st Century Environment. Paris: Institut francais des relations internationales.

U.S. Department of Energy (DOE). National Nuclear Security Administration (NNSA). 2013. Fiscal Year 2014 Stockpile Stewardship and Management Plan, Report to Congress, June 2013. Washington, D.C.: Department of Energy.

Voice of Russia UK. 2013. “Lavrov: nuclear arms reductions not limited to Russia and US.” RIA Novosti. June 22. http://voiceofrussia.com/uk/2013_06_22/Lavrov-nuclear-arms-reductions-Russia-and-US (November 27, 2013).

Woolf, Amy F. U.S. Strategic Nuclear Forces: Background, Developments, and Issues. Washington, D.C.: Congressional Research Service.

Wilkening, Dean A. 2010. "Nuclear Zero and Ballistic Missile Defence."  Survival 52: 107-26.

———. 2012.  "Moscow Conference Highlights NATO-Russian Gap on Missile Defense.” World Politics Review May 4.