Kathryn Lynnes, Air Force senior adviser for Kirtland fuel spill, left, and John Henderson, the assistant secretary of the U.S. Air Force for installations, environment, and energy, listen as Trent Simpler, Army Corps of Engineers project manager for the bulk fuels facility, explain processes of the groundwater treatment facility 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)