Contractors from Fuji Electric System Company, Limited work to remove a busbar on the gas-insulated high-voltage switchgear from which gas leaked at Yokota Air Base, Japan, April 8, 2017.The 374th Civil Engineer Squadron along with the contractors repaired the gas leak from one of the gas-insulated high-voltage switchgear in the West Substation to prevent further damage. (U.S. Air Force photo by Machiko Arita)