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.
According to the Office of Personnel Management (OPM), as of December 2011, there were approximately 2.79 million civil servants (civilian, i.e. non-uniformed) employed by the US Government. (This includes executive, legislative and judicial branches of government.