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.
Choose a career track. Foreign service officers can pursue a consular, economic, management, political or public diplomacy track. Each track has its own distinct job duties and working conditions. Assessments exist to help you narrow down what you'd like to do.