Gen. David Thompson, vice chief of space operations, U.S. Space Force, looks at samples tested in the Arnold Engineering Development Complex Space Threat Assessment Testbed as Savannah Langer, a space test engineer, briefs him on the Space Asset Resilience capability at Arnold Air Force Base, Tenn., headquarters of AEDC, Feb. 5, 2021. (U.S. Air Force photo by Jill Pickett)