NASA/KST QF-106A sitting in the static line-up at the 1997 Edwards AFB show. This QF-106 was used by Kelly Space & Technology to demonstrate a reusable tow launch vehicle in a project known as Eclipse for the Air Force. A couple months after this photo was taken they made the first towed flight behind a C-141. You can read about the details here; https://www.nasa.gov/centers/armstrong/news/FactSheets/FS-049-DFRC.html