About the Nuclear Security Enterprise
The strategic environment has changed with the expanding capability of world actors. The future environment is less predictable and demands our national deterrence strategy accounts for the nature of this uncertainty.
NNSA's core missions include maintaining the nuclear stockpile, monitoring and promoting nonproliferation, powering the nuclear Navy, and responding to nuclear and radiological emergencies.
President Donald J. Trump directed the Secretary of Defense to initiate a new Nuclear Posture Review to ensure the nation's nuclear deterrent is modern, robust, flexible, resilient, ready and appropriately tailored to deter 21st century threats and reassures allies.