Dr. Richard Joseph, Chief Scientist of the United States Air Force, Washington, , listens to Lt. Col. Ian Stewart, David Grant United States Air Force Medical Center, speak about medical innovations developed at the facility during a visit to Travis Air Force Base, Calif., July 12, 2018. Joseph toured DGMC, Phoenix Spark lab and visited with Airmen. Joseph serves as the chief scientific adviser to the Chief of Staff and Secretary of the AF, and provides assessments on a wide range of scientific and technical issues affecting the AF mission.

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