听力原文： The U.S. military is to throw more ships, planes and personnel into the effort to stem the flow of cocaine and marijuana northward from Latin America. Defense Department officials are expected to announce Friday a plan to detect drug smugglers which includes surveillance by U.S. warships and radar planes in the Caribbean and the use of reconnaissance satellites. Also expected as part of the effort is the expanded use of military personnel to help law enforcement agencies search cargoes at U.S. ports and to increase training of counter-narcotics personnel from Latin American countries. The plan is not expected to include the stationing of warships off the Columbia coast, a controversial proposal rejected by Columbia in January. According to the news, what are Defense Department officials expected to do on Friday?