Mark Correll, deputy assistant secretary of the Air Force for Environment, Safety and Infrastructure, left, and John Henderson, the assistant secretary of the U.S. Air Force for installations, environment, and energy, listen to Trent Simpler, Army Corps of Engineers project manager for the bulk fuels facility, explain the process of the groundwater treatment facility to at Kirtland Air Force Base, N.M., March 26. Henderson toured the groundwater treatment facility during his visit to the base. (U.S. Air Force photo by Staff Sgt. J.D. Strong II)