A unique “hot box” was fabricated to satisfy the specific temperature requirements for this F-35 canopy test conducted by the 846th Test Squadron, 704th Test Group, Arnold Engineering Development Complex, March 27, 2020, at Holloman Air Force Base, N.M. The individuals in the picture are securing the “hot box” structure in preparation for the final closure prior to the canopy test. (U.S. Air Force photo by Timothy Gros)