摘要：The Nuclear Posture Review (NPR) covers all aspects of nuclear weapons policy – the role of nuclear weapons, the conditions under which the United States would consider the use of these weapons, the operational aspects of nuclear planning, force structure requirements, and key decisions on the supporting infrastructure. This document does not only send a deterrence message to potential adversaries, but it is also an important reassurance to the allies and partners of the US. A NPR is traditionally in effect for a period of 5–10 years.
