161025-N-PZ713-010 SAN DIEGO (Oct. 25, 2016) Capt. Rita Simmons, center left, commanding officer at Naval Health Research Center (NHRC), and Jay Heaney, center right, give Deputy Assistant Secretary of Defense for Research, Dr. Melissa L. Flagg, left, a tour of the command’s environmental chamber. The chamber is part of the Warfighter Performance Lab and can simulate environments with temperatures ranging from -23°F to 130°F and relative humidity ranging from 5 to 90 percent. As the DoD's premier deployment health research center, NHRC's cutting-edge research and development is used to optimize the operational health and readiness of the nation's armed forces. (U.S. Navy photo by Mayra A. Conde/Released)