RAC 1 Prep
Maj. Sarah Kercher directs Tech. Sgt. Tyler Wineman in preparation for an oxygen system test inside a Research Altitude Chamber at Wright Patterson Air Force Base, Ohio, April 15, 2022. The chamber is one of three at the base that were certified in March for manned research up to 50,000 feet, a benchmark found nowhere else in the Department of Defense. Wineman is an aircrew flight equipment research technician and Kercher is an aerospace physiologist. Both are assigned to the 711th Human Performance Wing, the Air Force Research Laboratory unit that operates the chambers. (U.S. Air Force photo/Jason Schaap)