John Henderson, the assistant secretary of the U.S. Air Force for installations, environment, and energy, left, listens to Trent Simpler, Army Corps of Engineers project manager for the bulk fuels facility, present tools used in 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)