Secretary of the Army John McHugh prepares to relight the permanent President John F. Kennedy Eternal Flame at Arlington National Cemetery, Va., Oct. 29, 2013. Accompanying the secretary is Arlington National Cemetery Chief Engineer Col. Michelle Stewart, who was charged with the overhaul of the permanent Eternal Flame, which included the installation of a new burner assembly and supporting infrastructure. Gas, electrical and compressed air lines were also upgraded. (U.S. Army photo by J.D. Leipold/Released)