The Department of Defense is headed by a civilian; the Secretary of Defense, who is appointed by the President of the United States. Under the Secretary of Defense, there are three military departments: The Department of the Army, the Department of the Air Force, and the Department of the Navy. 1  Each of these military departments are also headed up by civilians; the Secretary of the Army, the Secretary of the Air Force, and the Secretary of the Navy.
Melanoma is not as common as other types of skin cancer, but it's the most serious and potentially deadly. Possible signs of melanoma include a change in the appearance of a mole or pigmented area.
Melanoma is a type of skin cancer that can occur anywhere on the body, but MayoClinic.com reports that in women, it most often appears on the lower legs. Melanoma can appear as a large brownish spot with darker speckles. Another sign of melanoma is a mole that bleeds or changes in color, size or feel. Melanoma can affect people of all skin tones.