base in Serra do Cachimbo, Pará. During the early 1990s, the "autonomous" / "parallel" program was dismantled with some of its projects and facilities being integrated to the safeguarded one. Although a CPI established in 1990 uncovered some of the clandestine nuclear activities that had been undertaken, the government did not issue an official account of all facilities, materials and activities involved in the covert program. While Collor was open to international cooperation and favored Brazilian integration in several multilateral institutions, there were no indications that he intended to sign the NPT. Indeed, Brazil would only accede to the non-proliferation regime in 1998, six years after Collor left office. Critical adhesion to the international nuclear regime Brazil and Argentina's joint collaborations became integrated with larger multilateral parties via the 1991 Quadripartite Agreement with IAEA and ABACC. The agreement entered into force in 1994, the same year as Brazil's full adhesion to the Treaty of Tlatelolco, an accord that prohibited nuclear weapons in Latin America and the Caribbean. The following year, Brazil attended the 1995 NPT Review Conference with observer status. On that occasion, the majority of the voting parties decided to indefinitely extend the treaty. Also in 1995, President Fernando Henrique Cardoso announced Brazil's decision to accede to the Missile Technology Control Regime (MTCR) and, thus, abstain from the production, acquisition or transfer of long-range missiles. In 1996, with the support of the U.S., Brazil was accepted as a member of the Nuclear Suppliers Group (NSG), after adjusting its internal legislation on dual-use equipment to the standards required by the group. For Luiz Felipe Lampreia, Brazil's foreign minister at the time, membership in the NSG was a crucial step in the gradual process of rapprochement with the international community due to Brazil's aspirations for a larger role in international nuclear trade. Shortly after becoming a member of the NSG, Brazil signed the Comprehensive Nuclear-Test-Ban Treaty (CTBT) on 24 September 1996, and deposited its instrument of ratification in July 1998. Brazil finally adhered to the NPT in 1998, and deposited its instrument of accession for the treaty on 18 September, of that year during a ceremony at the U.S. State Department. On that occasion, then-U.S. Secretary of State Madeleine Albright lauded Brazil and its representative, Minister Lampreia, for its decision to accede to the NPT. As Lampreia would state, one of the Brazil's motivations for NPT accession was the belief that