In the 1970s, during the Cold War era, European and North American states began a dialogue in Helsinki which became known as the Conference on Security and Cooperation in Europe (CSCE), or the Helsinki process. For Western states the CSCE served as a platform to raise questions related to security in Europe and the protection of human rights and fundamental freedoms. Eastern European states considered the CSCE as a means to secure the postwar borders and an opportunity to discuss economic and scientific cooperation. Today, 51 European States, plus the United States of America and Canada, participate in this process. Notwithstanding the many and often intense political tensions between the West and the East during those twenty years, quite a number of conferences, seminars and other meetings were held and a great many agreements were adopted and documents issued, dealing with matters related to CSCE's three main areas of concern: security in Europe; cooperation in the fields of economics, science, technology and environment; the promotion of human rights. In response to the fundamental changes in Europe in the late 1980s, the CSCE was given a new impetus and its operational framework was broadened. CSCE offices were established in Prague (CSCE Secretariat), Vienna (Conflict Prevention Center) and Warsaw (Office of Democratic Institutions and Human Rights) with the aim to strengthen and monitor compliance with CSCE commitments, especially in the area of human rights. A Parliamentary Assembly was established and met twice, first in Budapest and then in Helsinki. A General Secretary and a High Commissioner on Minorities were appointed, with offices in Vienna and The Hague, respectively.