The eternal flame will burn more efficiently once repairs are completed at the end of the month.
Officials at Arlington National Cemetery say after four decades of use, the eternal flame at President John F. Kennedy's gravesite is in need of an upgrade.
Planners are now installing new gas lines and more efficient burners. The work should be completed by late this month. Visitors will still be able to see the eternal flame when they visit the memorial. Before construction began, workers used a torch to carry the flame and pass it to a temporary burner that's visible to tourists.
The flame, which was lit in its current location in 1967, will be passed back to the original site after construction is completed.