American pressure against the government escalated throughout 1983 and 1984; the Contras began a campaign of economic sabotage and disrupted shipping by planting underwater mines in Nicaragua's Port of Corinto, an action condemned by the International Court of Justice as illegal. The U.S. refused to pay restitution and claimed that the ICJ was not competent to judge the case. The United Nations General Assembly passed a resolution in order to pressure the U.S. to pay the fine. Although only Israel and El Salvador, which was receiving massive amounts of military aid to fight its own guerrilla insurgency, voted with the U.S., the money still has not been paid. Jeane Kirkpatrick, the American ambassador to the UN under Reagan, criticized the Court as a "semi-judicial" body. despite the fact that the U.S. was legally bound by the court's decision, had signed the relevant treaty, and had made use of the court in other cases. On May 1, 1985, Reagan issued an executive order that imposed a full economic embargo on Nicaragua, which remained in force until March 1990.