Despite gains in international co-operation, several factors, including resource limitations and lack of political will, have impeded U.S. progress in helping governments become full and self-sustaining partners in the counternarcotics effort -- a goal of U.S. assistance. These countries have limited resources to devote to this effort, and many initiatives are dependent on U.S. support. Programs to build maritime interdiction capacity have been particularly affected, as partner nations lack fuel and other resources needed to operate and maintain U.S.-provided boats. Limited political support, particularly in Venezuela, and corruption have also hindered U.S. counternarcotics efforts. In addition, the Department of Homeland Security (DHS) has implemented a Container Security Initiative (CSI) that targets and scans containers for weapons of mass destruction and terrorist contraband. But CSI has not routinely been used for illicit drug detection, despite its applicability for this purpose.