WRIGHT-PATTERSON AIR FORCE BASE, Ohio (Dec. 15, 2020) Lt. Maria Greenwood, research psychologist assigned to Naval Medical Research Unit Dayton (NAMRU-Dayton), investigates occupational health hazards. Her research contributes to the NAMRU-Dayton�s mission of protecting and enhancing the readiness, performance, and survivability of joint warfighters. Greenwood is in NAMRU-Dayton�s Environmental Health Effects Laboratory (EHEL), which uses various research equipment to evaluate potential hazards and stressors in the military operational environment. Scientists can measure respiratory physiology using a whole body plethysmograph system for laboratory research models. (U.S. Navy photo by Megan Mudersbach)