Secretary of the Army John McHugh relights the JFK Eternal Flame at Arlington National Cemetery, Va., Oct. 29, 2013. A temporary eternal flame had be lit April 29, 2013, so Army Corps of Engineer personnel could install a new burner assembly and rebuild the 50-year old infrastructure. Gas, electric and compressed air lines were also upgraded. (U.S. Army photo by J.D. Leipold/Released)