ARLINGTON, Va. – Brian Swersky of Gasman Services and Consulting makes adjustments to the gas and airflow to the John F. Kennedy Eternal Flame Oct. 1, 2013. The flame is undergoing upgrades overseen by the Norfolk District, U.S. Army Corps of Engineers,with a new burner, igniter, gas, and air lines as well as new safety controls and sensors. (U.S. Army photo/Patrick Bloodgood)