Airman Robert Briones, 62nd Fighter Squadron F-35 Crew Chief, has medical measurements taken from him while performing daily tasks Aug. 22, 2017 at Luke Air Force Base, Ariz. Briones was one of several Airmen who took part in an assessment on air quality and heat stress conducted by the USAF School of Aerospace Medicine. (U.S. Air Force photo/Airman 1st Class Caleb Worpel)