Beginning with the Strategic Arms Limitation Talks (SALT – 1969) and the Treaty on the Non-Proliferation of Nuclear Weapons (NPT – 1970), there has emerged a strong international community that is committed to the control and elimination of dangerous nuclear manufacturing and trade. As a signatory of the NPT Canada has played a significant role in various non-proliferation, arms control and disarmament (NACD) negotiations. One of Canada’s major contributions to the international NACD community has been nuclear verification – a process by which dangerous nuclear weapons and activities are monitored using a variety of technologies. Much of this series includes documents that describe Canada’s scientific and technological contribution to nuclear verification by satellite. Since the 1970s, the international NACD community has made a strong monetary commitment in R&D to uncover clandestine nuclear activities, and this series documents Canada’s contribution to that process.