Pentagon Acquires New B61-13 Nuclear Bomb

By Johnny Franks, Warrior Editorial Fellow

The US modernization of its nuclear arsenal has been catalyzed in part by the increasingly aggressive postures of Russia and China, all but forcing a strategic pivot towards enhancing nuclear deterrence capabilities for the 21st century. In late 2023, the Department of Defense (DoD) announced its intention to modernize the US nuclear arsenal by constructing a new type of the B61 nuclear gravity bomb, named the B61-13. It is one of the US modernization initiatives to upgrade its nuclear armament to address the evolving global security threats, especially those posed by Russia and China. The B61-13 would replace older versions of the bomb, namely the B61-7, with a yield that mirrors its predecessor’s capabilities but is enhanced in terms of safety, security, and accuracy features akin to those of the B61-12 model.

The technology of the B61-13 is based on the legacy of its predecessors, employing modern inertial guidance systems for improving accuracy and incorporating the existing warheads from the 1980s and 1990s. The combination of the old and new is intended to present the United States with a more reliable and versatile nuclear deterrent that could face the myriad threats of the 21st century. The B61-13, like the B61-12, will be interchangeable with several strategic bomber platforms, but not the F-35 Joint Strike Fighter as initially announced. This development comes amid an escalation of nuclear arms development by Russia and China. The United States sees the B61-13 as necessary for maintaining credible nuclear deterrence in this rapidly changing security environment. The bomb is supposed to give the US military more flexibility in targeting, with the capability to strike harder and larger-area military targets more effectively. This design incorporates a precision strike with significant destructive power, particularly a crucial element in the deterrence factor.

The aircraft expected to be equipped with the B61-13 include modern strategic bombers such as the B-21 Raider, a next-generation aircraft under development by Northrop Grumman for the United States Air Force. The B21 Raider is designed for stealth and versatility across a wide range of mission sets, including delivering advanced nuclear payloads like the B61-13. While the B61-13 will not be deployed on the F-35 Joint Strike Fighter, it’s anticipated that other current and future air platforms capable of strategic nuclear delivery will be considered for its deployment.

The B61-13 is also a part of the US strategic response to political debates over its nuclear posture. The B61-13 represents a significant compromise between the need to maintain high-yield nuclear capabilities and modernizing the arsenal with more accurate and secure weapons. It is the balance between keeping a solid deterrent and tackling concerns about nuclear proliferation and safety.

Although some perceive this latest modernization effort as a compromise, critics argue it is ill-advised. The Bulletin of the Atomic Scientists argues that the world’s most pressing threats—not only those of proliferation but global security challenges—demand innovative solutions beyond traditional dependence on nuclear deterrence. The decision to develop new nuclear capabilities, such as the B61-13, could only be regarded by some as exacerbating dynamics of the nuclear arms race, undermining efforts towards nuclear disarmament, and diverting crucial resources from pressing global needs, such as climate change mitigation and pandemic preparedness.

The development of the B61-13 signals how critical nuclear weapons are to the strategies of national security, a technology that keeps evolving to meet new challenges. The ongoing decision of this weapons development, then, underscores how high the nuclear threats between nations remain.