A member of the U.S. Army Band, "Pershing's Own," sings at a farewell ceremony in honor of outgoing Secretary of Defense Leon E. Panetta in the center courtyard at the Pentagon in Arlington, Va., Feb. 12, 2013. Panetta, whose public service career spanned four decades and included stints as a lawmaker, White House chief of staff and CIA director, oversaw the repeal of a ban on gays serving openly in uniform and opened combat roles to women." (U.S. Army photo by Eboni Everson-Myart/Released)