The U.S. was found to have had a very large role in providing financial support, training, weapons, and other logistical support to the Contras over a lengthy period of time, and that this support was essential to the Contras. In 1984, the ICJ ordered the United States to stop mining Nicaraguan harbors, and respect Nicaraguan sovereignty. A few months later the court ruled that it did have jurisdiction in the case, contrary to what the U.S. had argued. The ICJ found that the U.S. had encouraged violations of international humanitarian law by assisting paramilitary actions in Nicaragua. The court also criticized the production of a manual on psychological warfare by the U.S. and its dissemination of the Contras. The manual, amongst other things, provided advice on rationalizing the killing of civilians, and on targeted murder. The manual also included an explicit description of the use of "implicit terror." Having initially argued that the ICJ lacked jurisdiction in the case, the United States withdrew from the proceedings in 1985. The court eventually ruled in favor of Nicaragua, and judged that the United States was required to pay reparations for its violation of International law. The U.S. used its veto on the United Nations Security Council to block the enforcement of the ICJ judgement, and thereby prevented Nicaragua from obtaining any compensation. The United States government provided support to several Cuban exiles after the Cuban Revolution in 1959, especially under the administration of George H. W. Bush. Among the most prominent of these were Orlando Bosch and Luis Posada Carriles, who were implicated in the 1976 bombing of a Cuban plane. Bosch was also held to be responsible for 30 other terrorist acts, while Carriles was a former CIA agent convicted of numerous terrorist acts committed while he was linked to the agency. Other Cuban exiles involved in terrorist acts, Jose Dionisio Suarez and Virgilio Paz Romero, two other Cuban exiles who assassinated the Chilean diplomat Orlando Letelier in Washington in 1976, were also released by the administration of George H.W. Bush.  Bosch was a contemporary of Fidel Castro at the University of Havana, where he was involved with the student cells that eventually became a part of the Cuban revolution. However, Bosch became disillusioned with Castro's regime, and participated in a failed rebellion in 1960. He became the leader of the Insurrectional Movement of Revolutionary Recovery (MIRR), and also joined a CIA effort to assassinate Castro, along with Luis Posada Carriles.