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.
That includes everyone who works for the president who doesn't report to another executive department or agency. Secret Service agents, for example, work at the White House, but are employed by the Department of Homeland Security. The EOP also includes a lot of people who work for the White House, but not at The White House. In fact, most of them work in the Eisenhower Executive Office Building next door, or the New Executive Office Building, or one of the converted townhomes on Jackson Place across Pennsylvania Avenue. The White House Office includes the people who directly advise and assist the president in his official duties. Think The West Wing.. There are about 450 of those.