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.
Secretary of Homeland Security The Secretary of Homeland Security leads the third largest Department of the U.S. government, with a workforce of 229,000 employees and 22 components including TSA, Customs and Border Protection, Immigration and Customs Enforcement, U.S. Citizenship and Immigration Services, FEMA, the Coast Guard, and the Secret Service.