A scale model of a GBU-38 mounted on a sting is positioned above a scale model of a B-52 Stratofortress in the 16-foot transonic wind tunnel at Arnold Air Force Base, Tenn., Jan. 14, 2022. The GBU-38 was undergoing store separation testing with various captive load configurations. Aircraft models are installed upside down in the wind tunnel for store separation testing. (U.S. Air Force photo by Jill Pickett)