A unique overview of the United States' current nuclear command, control, and communications system and its modernization for the digital age Concerns about the security of nuclear command, control, and communications (NC3) systems are not new, but they are becoming more urgent. While modernization is crucial to the future success of NC3 systems, the transition from analog to digital technologies has the potential to introduce vulnerabilities and unintended consequences. Nuclear infrastructure and command could be penetrated, corrupted, destroyed, or spoofed, leading to a loss of positive control (the ability to fire weapons) or negative control (the ability to prevent unauthorized or accidental use). Nuclear Command, Control, and Communications explores the current NC3 system and its vital role in ensuring effective deterrence, contemporary challenges posed by cyber threats, new weapons technologies, and the consensus across the nuclear enterprise of the need to modernize the United States' Cold War-era system of systems. This volume, edited by James J. Wirtz and Jeffrey A. Larsen, offers the first overview of US NC3 since the 1980s. Part 1 provides an overview of the history, strategy, and technology associated with NC3 and how it enables deterrence strategy as the basis of national defense. Parts 2 and 3 identify how the US military's NC3 works, the challenges of introducing digital technologies and the potential security threats, and how the system could fail if these considerations are not taken into account. Part 4 explains the progress NC3 has made thus far, and how we might move forward. During this critical juncture, policymakers, practitioners, and scholars will find this an invaluable resource to understanding our current NC3 system, its relationship to effective deterrence, what must be done to modernize NC3, and how to ensure this transition is undertaken safely and successfully.

Improvements to strategic situational awareness (SA)-the ability to characterize the operating environment, detect and respond to threats, and discern actual attacks from false alarms across the spectrum of conflict-have long been assumed to reduce the risk of conflict and help manage crises more successfully when they occur. However, with the development of increasingly capable strategic SA-related technology, growing comingling of conventional and nuclear SA requirements and capabilities, and the increasing risk of conventional conflict between nuclear-armed adversaries, this may no longer be the case. The Project on Nuclear Issues (PONI) at the Center for Strategic and International Studies (CSIS) and the University of California, Berkeley's Nuclear Policy Working Group undertook a two-year study to examine the implications of emerging situational awareness technologies for managing crises between nuclear-armed adversaries.

A unique overview of the United States' current nuclear command, control, and communications system and its modernization for the digital age Concerns about the security of nuclear command, control, and communications (NC3) systems are not new, but they are becoming more urgent. While modernization is crucial to the future success of NC3 systems, the transition from analog to digital technologies has the potential to introduce vulnerabilities and unintended consequences. Nuclear infrastructure and command could be penetrated, corrupted, destroyed, or spoofed, leading to a loss of positive control (the ability to fire weapons) or negative control (the ability to prevent unauthorized or accidental use). Nuclear Command, Control, and Communications explores the current NC3 system and its vital role in ensuring effective deterrence, contemporary challenges posed by cyber threats, new weapons technologies, and the consensus across the nuclear enterprise of the need to modernize the United States' Cold War-era system of systems. This volume, edited by James J. Wirtz and Jeffrey A. Larsen, offers the first overview of US NC3 since the 1980s. Part 1 provides an overview of the history, strategy, and technology associated with NC3 and how it enables deterrence strategy as the basis of national defense. Parts 2 and 3 identify how the US military's NC3 works, the challenges of introducing digital technologies and the potential security threats, and how the system could fail if these considerations are not taken into account. Part 4 explains the progress NC3 has made thus far, and how we might move forward. During this critical juncture, policymakers, practitioners, and scholars will find this an invaluable resource to understanding our current NC3 system, its relationship to effective deterrence, what must be done to modernize NC3, and how to ensure this transition is undertaken safely and successfully.

The United States must be prepared to operate in a range of complex environments to meet a range of security challenges and threats, such as humanitarian emergencies, terrorism and violent extremism, great power aggression, health security crises, and international criminal violence. This study focuses on these five functional security imperatives and illustrates each imperative through regionally or subnationally defined operating environments. In each case, the selected security imperative must be addressed in the near term to help meet other U.S. objectives. The goal of the case studies is to characterize the operating environment, identify key tasks and responsibilities to address the security imperative, and develop a set of tools and policy recommendations for operating in those specific environments.

In recent years, it has become increasingly clear to many observers that the Department of Defense must better communicate to the officers at the tactical end of the nuclear mission a rationale for nuclear weapons and deterrence, the critical role that they play in the post-Cold War strategy of the United States, and the value of nuclear weapons to the security of the American people. This report tracks the changing conceptual and political landscape of U.S. nuclear deterrence to illuminate the gap in prioritizing the nuclear arsenal and to build a compelling rationale for tactical personnel explaining the role and value of U.S. nuclear weapons.