[20220329]IN10553_美国核武器政策：考虑“无首次使用”.pdf

U.S. Nuclear Weapons Policy: Considering “No First Use” Updated March 29, 2022 The Biden Administrations Nuclear Posture Review (NPR) reviewed U.S. nuclear declaratory policythe statements the United States makes about when, how, and why it might use nuclear weapons to deter adversaries and reassure U.S. allies of its commitment to their defense. But, according to an Administration fact sheet, the NPR will not alter this policy to include a “no first use” pledge stating that the United States will never use nuclear weapons first in a conflict or a “sole purpose” policy stating that the sole purpose of nuclear weapons is to deter nuclear use. Instead, the NPR will state that “the fundamental role of U.S. nuclear weapons is to deter nuclear attack on the United States, our allies, and partners.” It will also indicate that “the United States would only consider the use of nuclear weapons in extreme circumstances to defend the vital interests of the United States or its allies and partners.” The United States has long pledged to refrain from using nuclear weapons against most non-nuclear weapon states, but has neither ruled out their first use in all cases nor specified the circumstan