Antinarcotics chiefs from the Caribbean are in Santo Domingo today for the Second Regional Meeting on Coordination and Cooperation for the Fiscalization of Drugs in the Caribbean. The event is organized by the Program of the United Nations for the International Fiscalization of Drugs and seeks to design a Caribbean plan to combat drug traffic. Sandro Calvani said that the Caribbean has become the preferred corridor for drug traffickers. He said that after Colombia and Mexico, the privileged geographic position of the Dominican Republic as center of the Caribbean has made it a bridge for exporters of cocaine to the United States. Among 16-18% of the drug introduced to the U.S. touches the D.R. He said the nation is being used by large cartels because it shares the island with Haiti, a nation with scant police and military vigilance. The D.R. is only 80 miles away from Puerto Rico.