Dr. Richard Joseph, center, Air Force chief scientist, looks at material samples that underwent recent testing, as Kellye Burns, left, an Arnold Engineering Development Complex space test engineer briefs him during his visit to Arnold Air Force Base, Tenn., Nov. 18, 2020. Also pictured is Col. Mario Serna, military assistant to the Air Force chief scientist. Test and evaluation of space materials is conducted to understand their performance in and susceptibility to a realistic space environment. (U.S. Air Force photo by Jill Pickett) (This image was altered by obscuring a badge for security purposes.)