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The US 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 US 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 US 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 Colombian coast, a controversial proposal rejected by Colombia in January.