The camshaft. The valve train consists of the valves and a mechanism that opens and closes them. The opening and closing system is called a camshaft. The camshaft has lobes on it that move the valves up and down, as shown in Figure 5. Most modern engines have what are called overhead cams.
A Foreign Service Officer (FSO) is a commissioned member of the United States Foreign Service. As diplomats, Foreign Service Officers formulate and implement the foreign policy of the United States.
Foreign Service Officers, who occupy most of the top tiers of the Foreign Service, are one of five categories of Foreign Service employees. Other categories include Foreign Service Nationals and Specialists (e.g., Special Agents of the U.S. Diplomatic Security Service). 1 FSO career tracks.