 2000 年以来，美国和联合王国根据 1958 年《共同防御协定》参与了一个广泛的合作方案，以便开发和评估核查未来的核武器裁减举措所需的方法和技术。这项工作包括：
• Since 2000, the United States and United Kingdom have engaged in an extensive program of cooperation under the 1958 Mutual Defense Agreement to develop and evaluate methodologies and technologies required to verify future nuclear weapon reduction initiatives. This work includes: