Beginning in the 1970s a growing and coordinated effort by US-based Cuban dissident groups organized to confront the Castro regime through international bodies such as the United Nations. The United Nations Human Rights Council in particular would become a major front in these confrontations as issues of human rights became more widely known, especially in the 1980s as the United States itself became more directly involved during the Reagan Administration, which had a tougher anti-Castro stance. In 1981 President Ronald Reagan's new administration announced a tightening of the embargo. The U.S. also re-established the travel ban, prohibiting U.S. citizens from spending money in Cuba. The ban was later supplemented to include Cuban government officials or their representatives visiting the U.S.