_ Observers William W. Burr, M.D. Deputy Director, Division of Biomedical and Environmental Research U.S. Energy Research and Development Administration L. Joe Deal Assistant Director for Field Operations Division of Operational and Environmental Safety U.S. Energy Research and Development Administration Tommy F. McCraw Division of Operational and Environmental Safety U.S. Energy Research and Development Administration Roger Ray Assistant Manager for Environment and Safety Nevada Operations Office U.S. Energy Research and Development Administration Lt. Col. Edwin T. Still, D.V.M., USAF Research Program Coordinator Armed Forces Radiobiology Research Institute Defense Nuclear Agency Bruce W. Wachholz, Ph.D. Office of the Assistant Administrator for Environment and Safety . U.S. Energy Research and Development Administration