The United States Commercial Service (CS) is the trade promotion arm of the U.S. Department of Commerce's International Trade Administration. CS is a part of the U.S. Foreign Service and its commercial officers are diplomats. The CS global network of trade professionals helps thousands of U.S. companies to export goods and services worth billions of dollars every year. CS trade specialists are located throughout the United States, as well as in U.S. embassies and consulates in over 75 countries around the world. The mission of CS is to advance and protect strategic U.S. commercial and economic interests around the world. - Source: Wikipedia
