Scientists Carolyn Griner, Ann Whitaker and Mary Johnston (top to bottom) are shown undergoing training at the Marshall Space Flight Center's Neutral Buoyancy Simulator in this 1975 photo. The scientists were part of a special program dedicated to gaining a better understanding of problems involved in performing experiments in space. Dr. Johnston specialized in metallurgical Engineering, Dr. Whitaker in lubrication and surface physics, and Dr. Griner in material science. Dr. Griner went on to become Acting Center Director at Marshall in 1998.
Image Credit: NASA