170106-M-EL431-0230 WASHINGTON (Jan. 6, 2016) Secretary of the Navy (SECNAV) Raymond E. Mabus, left, and his family stand during his farewell parade at Marine Barracks, Washington, D.C. Mabus was the longest serving Secretary of the Navy since World War I. (U.S. Marine Corps photo by Cpl. Samantha K. Braun/Released)