Ronald L. Woodfin, PHD, is a retired systems engineer of Sandia National Laboratories, where he held the title principal member of the technical staff. With special interests in techniques related to mine warfare and humanitarian demining, Woodfin has served on several National Research Council Committees, including the Committee on Review and Evaluation of the Army Non-Stockpile Chemical Material Disposal Program and the Committee for Mine Warfare Assessment of the Naval Studies Board. He also chaired the chemical sensing sessions in the Fifth, Sixth, and Seventh International Symposia on Technology and the Mine Problem.